Can I post about my product here?
Only if it is directly about dumpster diving or making something out of trash, and only if links to your own content stay at ten percent or less of your posts to the subreddit.
Subreddit guides
r/DumpsterDiving rules, stats, and what to post
A source-backed Rankhog guide to r/DumpsterDiving: public rules, community context, posting fit, and startup-promotion risk before you publish.
By Anthony Riera, founder and operator of Rankhog.
Subreddit guides combine public Reddit source URLs, captured rules, visible verification dates, and Rankhog's account-safety workflow.
Current public stats
- Members
- 414,075
- Verified
- October 20, 2026
- Category
- Hobby and enthusiast communities
Rules can change, so Rankhog keeps verification dates and the original public Reddit sources visible.
Rule summary
- Off-topic: Posts that are off-topic (have nothing to do with the purposes of the subreddit as stated in the sidebar)
- Hate speech: Hate speech or other oppressive speech that may make other users feel unwelcome or uncomfortable based on their biological sex, race/ethnicity, sexual orientation, gender identity or expression, cultural background, age, or physical or mental ability
- Limit self-promotion: Links to your own content should account for no more than 10% of your posts to the subreddit. [See Reddit's guideliness on self-promotion.](https://www.reddit.com/wiki/selfpromotion)
- No selling: Our sub is not eBay. Please don't use it to sell your stuff.
- No food shaming: This is not a health food sub. Unsolicited posts and comments critiquing the supposed unhealthiness of found food will be removed.
- Rudeness: Please don't be needlessly rude here. This subreddit should be a friendly, informative resource, not a place to air grievances. This is a space for people to engage constructively; no belittling, insulting, or disrespectful language is permitted.
- Troll: Troll
Works well
- A first-hand account of a recent dive, with photos of what you found and the story of how you found it.
- A write-up of a project where you turned something pulled from the trash into something useful or cool.
- Practical advice for new divers, like how to stay safe, what tools help, or how to spot good pickup days.
- A genuine question asking the community how they store, clean, or repurpose a type of find you keep running into.
- An on-topic tool or resource shared only after you have posted plenty of non-promotional content, keeping your own links at or under ten percent of your posts.
Avoid
- Posting links to your own content when they make up more than ten percent of your posts to the subreddit, which breaks “Limit self-promotion”.
- Using the subreddit to sell anything, which breaks “No selling”.
- Posting about a topic that has nothing to do with dumpster diving or repurposing trash, which breaks “Off-topic”.
- Leaving a comment critiquing how healthy or unhealthy someone's found food is, which breaks “No food shaming”.
- Belittling, insulting, or talking down to other users, which breaks “Rudeness”.
- Posting hate speech or anything that makes other users feel unwelcome based on who they are, which breaks “Hate speech”.
What r/DumpsterDiving Is For
This community is for people who find cool stuff in trash, or make cool stuff out of trash. People come here for advice, information, and first-hand accounts about dumpster diving. That means stories about what they found, tips on how and where to look, and ideas for turning discarded things into something useful or fun. The tone the rules ask for is friendly and informative, a resource people can learn from.
Rules That Matter Before Posting
The rule that decides most marketing outcomes here is “Limit self-promotion”, which says links to your own content should account for no more than 10% of your posts to the subreddit. “No selling” matters just as much, because the sub is not eBay and you cannot use it to sell your stuff. “Off-topic” will catch anything that has nothing to do with the purposes of the subreddit as stated in the sidebar. If you comment on people's finds, “No food shaming” removes unsolicited posts and comments critiquing the supposed unhealthiness of found food. Finally, “Rudeness” requires everyone to engage constructively, with no belittling, insulting, or disrespectful language.
What To Post
Post things that are directly about dumpster diving or repurposing trash. A first-hand account of a dive, a photo of something you rescued, or a project where you turned trash into something cool all fit the stated purpose. If you are a founder, the honest path is to join the conversation first, share your own finds and projects, and keep any links to your own content at or under 10% of your posts to the subreddit. A tool or story that genuinely helps people find, sort, or repurpose things can work, as long as it is on-topic and you are not selling in the post.
What To Avoid
Do not post anything off-topic, meaning anything with nothing to do with the purposes of the subreddit as stated in the sidebar. Do not link your own content more than the “Limit self-promotion” rule allows, which is no more than 10% of your posts to the subreddit. Do not try to sell anything, because the sub is not eBay. Do not critique the healthiness of food other people found, even with good intentions, because unsolicited posts and comments like that get removed. Do not be needlessly rude, belittle anyone, insult anyone, or post hate speech or oppressive speech of any kind. And do not troll, because troll posts get removed.
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Common questions about r/DumpsterDiving
Can I sell my finds or my product in this subreddit?
No. The “No selling” rule says the sub is not eBay and you should not use it to sell your stuff.
How much self-promotion is allowed?
The “Limit self-promotion” rule caps links to your own content at no more than ten percent of your posts to the subreddit.
Can I comment that found food is unhealthy or unsafe?
No. The “No food shaming” rule removes unsolicited posts and comments critiquing the supposed unhealthiness of found food.
Can I post about a general business or marketing topic here?
No. The “Off-topic” rule removes posts that have nothing to do with the purposes of the subreddit as stated in the sidebar.
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