i tried to study the line on chess.com and there appears to be no game in the data base that supports the sac ...7.Bxf7....i actually think its a good move.
Ponziani opening..why do they keep going into the hole?

No line supports it because it's not a good move. Any decent player with the black pieces would win. Sacrifices with so few pieces out are rarely good.

People [most people] do not play that line as White as with best play it loses.
Black has to defend well but why play a line which theoretically loses?

It is fun to think the Ponziani was named after a scam but in reality it is the other way around. People play against the Ponziani for the first time and lose and it seems to them that they were scammed.
I learnt about Ponziani opening online. i am an average player who is quite enthusiastic. i find surprising that i could finish a game in 10 moves..just because my opponents take the wrong turns.
1.e4 e5, 2.Nf3 Nc6, 3.c3...heralding the ponziani..Nf6,4.d4 exd,5.e5 Nd5,6.Bc4 Nb6,7.Bxf7 8.Kxf7,9.Ng5+ then the king enters the hole!..Kg8 10.Qb3+ and a mate is made! why is this an attractive choice(Kg8)? want answers.