Posting and commenting are different doors.
Example: real reads from Kasspian's room library, 18 Aug 2026. Many rooms remove a promotional post and welcome a good answer on a thread someone already started. Each read describes how the room behaves; it does not quote its rules.
Want the rules themselves? Which subreddits allow self-promotionquotes each room's own rule on promotion, with the date it was read.
Kasspian checks every room it sends you to
It finds the threads where your buyers are already asking, reads each room's door the same way, and writes the reply with you, as a comment where posting is shut.
Your repliesthis week
Example1 reply turned into a $49/mo customer
Questions
How can I check if a subreddit allows self-promotion before posting?
Read three places in order: the sidebar rules (on mobile, the About tab), any pinned post, and the wiki if the room links one. Then look at what survives: sort the room by new and see whether posts mentioning a product are still up after a day. This checker does that read for you, one room at a time, and answers posting and commenting separately, because many rooms that remove promotional posts still allow a disclosed mention in a helpful comment.
Can I promote my product on Reddit?
In some rooms, in some forms. Most subreddits treat promotional POSTS and helpful COMMENTS completely differently: the post gets removed while a genuine answer on an existing thread is welcome. Check the specific room, and when in doubt, comment rather than post.
Will my post get removed?
If the room's rules restrict self-promotion and your post reads as promotion, usually yes, and quickly. This checker gives an honest read on how a given subreddit tends to treat it, hedged where we cannot be sure, so you can pick a different door before spending the post.
Is this checker free?
Yes, free and no signup. It checks one room at a time. A full Kasspian read finds the rooms where your specific buyers already ask, runs this same check on every one, and drafts your first reply.