In return for sacrificing one or two pieces in the Jerome Gambit, White gets some pawns. "Objectively" they are not enough compensation, but at times they can cause quite a number of problems for the defender. Witness the following game.
Wall, Bill - Chrisbow
1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+
4...Kxf7 5.Nxe5+ Nxe5 6.d4 Bxd4 7.Qxd4 d6 8.O-O Nf6
And now for the pawns...
9.f4 Nc6 10.Qd3 d5 11.e5 Ne4 12.c4 Nc5
13.Qa3 b6 14.b4 Ne6 15.f5 Ned4 16.e6+ Kf6
Off to his doom! 16...Kf8 was necessary.
17.Qe3 h6 18.Bb2 dxc4 19.b5 Na5 20.Bxd4+ Ke7 21f6+ Ke8 22.fxg7 Rg8 23.Rf8+ Rxf8 24.gxf8=Q+ Kxf8 25.Qf4+ Ke8 26.Qf7 checkmate