Some of it, yes — and this is where the line falls:
Fine: sharing your handle for a mainstream social app in conversation, once you actually know someone. Fan accounts and tribute accounts are welcome too.
Not fine: spamming chatrooms or message requests with the same promotional message, repeatedly or across multiple rooms.
Not fine: putting payment links, paid content or products in your bio.
Not fine: selling or soliciting paid sexual content of any kind, which is a permanent ban.
Not fine: pushing people onto an anonymity app — one built around untraceable, encrypted or disappearing messages — at any point.
If you're not sure, the test is whether you're talking to people or broadcasting at them. Report anything that crosses the line using the three dots menu.