There is a person on this site, who keeps creating new identities (the current is "3030", it used to be "orion", "ares" and many more such as "abcd", etc. some time ago). He usually has a sentence "standard chess only" in his profile. He creates new public invitations (a few games of chess and a couple of 3-win chess matches) with each new ID. After you accept one of these, he deletes the game or gives it up after a couple of moves.

I am posting this as a warning for those who would accept his invitations - it is just a waste of time and game slots for pawns.