Black goes e6 and then counterattacks fast on the queenside for an advantage. I'm not sure why it's so common on this server, but I see it frequently as well.
It just makes no sense to me. If you look at an opening explorer, Black wins like 61% of games that begin 1. e4 c5 2. Bc4, so you'd think that 1500+ players have some clue that it doesn't work...?
Why do I see this garbage so often? I literally see 2. Bc4? as often as I do 2. Nf3 against 1. ...c5.