Six rules. They exist so this stays worth reading.
1. No spam, no drive-by advertising. Linking your shop inside a real answer is fine and encouraged. Showing up only to drop a link is not.
2. Be decent to each other. Disagree with the idea, not the person. Insults, pile-ons and personal attacks get removed.
3. Do not share or resell paid material. Not mine, not anyone else's. This includes posting files you bought, in whole or in part.
4. No income promises. Do not tell people what they will earn. You do not know, and neither do I. Share what happened to you and let people draw their own conclusions.
5. Be one person, honestly. One account. Do not pretend to be someone you are not, and do not create a second account to get around a ban.
6. Keep it roughly on topic. This is a place about selling online. Off-topic happens and that is fine; a board full of it is not.
What happens if you break them
First time, on something minor, I will usually just edit or remove the post and tell you why. Repeat it, or do something serious — spam, abuse, reselling files, payment fraud — and the account gets suspended. Suspensions can be temporary or permanent depending on what happened, and you will always be told the reason.
If your account is suspended you can still reach the contact page to appeal it. If I got it wrong, tell me and I will fix it.
The full version is in the community guidelines.
Mockwren