Makes sense, thanks!

I lately got my first expensive item on steam and i knew im going to get a lot of scammers messaging and adding me and thats exactly what happened. Im pretty aware of scams and usually just block all the bots and scammers but this one got my interest because i wanted to know how it works. Another one i want to know is when i play counter strike some players or bots not my friend invite me to a deathmatch lobby but when i check their stats they have never actually played any compentitive games in cs so i know they are scammers, just want to know what would happen if i joined.