are people allowed to rp your ocs? I see them being used A LOT

Sure. a lot of that is out of my control.

But As long as PROPER credit is given, you’re doing good in my book. (And not “CREDIT GOES TO ARTIST” Don’t want folks being confused who the character’s actual owner or the artist is. It’s kinda hard to be at this point. BUT If it ever gets to that point, that would probably be the only time I’d actually have to step in.)

It’s simple enough, just don’t claim ownership.
Link to any ONE of the sites I post my work (Tumblr,Twitter,FA) or just put my username somewhere visible so anyone that stops by will see it. (Profile info, Page description, pinned tweet, places like that. and NOT like in a hidden comment posted somewhere someone has to dig/really look around in your comments or replies to find. Don’t do that shit please.)