8...Bxc2 in the Qa5 variation of Scandinavian Def.

It has come to my attention that the main line of Scandinavian defense simply loses a pawn (as white).

Renowned Chess author Robert M Snyder mentions that 8...Bxc2 is a mistake (in his book - Winning Chess Tournaments for Juniors) because of 9. d5, but I don't understand why 9. d5 gives any advantage for White (Fritz say the position is equal, even though White is down a pawn). 

What is so good about Whites position (below), and does White have enough compensation for the pawn?

Yo creo que la ventaja está en la gran movilidad que reciben las piezas blancas, todas estan desarrolladas mientras si nos fijamos bien las negras estan retrasadas en su desarrollo, la dama puede correr peligro por los rayos X que le hace el alfil desde d2. El blanco tambien tiene ventaja de espacio

Black's position is precarious after 9...cxd5 10.Bb5+ Nc6 11.Nxd5 Qxd8. Something like 12.Nxf6 Qxf6 13.Bxc6 bxc6 14.Qc4 looks troublesome.

I would stop using whatever version of Fritz you're using. Fritz 13 gives +- 2.55

I'm surprised you think black is ok. I mean, what would you play here as black? 

Needed a chessboard to visualize the moves.. My bad with my ignorant comments, I don't usually analyse openings past move 10.