Why play the Blackburne Shilling Jerome Gambit, when there are perfectly playable responses for White within the regular lines of the Blackburne Shilling Gambit? Fun and familiarity are two reasons. The chance for a miniature is another.
DVYate - melazzini
1.e4 e5 2.Nf3 Nc6 3.Bc4 Nd4
The Blackburne Shilling Gambit.
The Blackburne Shilling Jerome Gambit.
(Certainly White can play 4.0-0, 4.Nxd4 or 4.c3 instead, with advantage.)
4...Kxf7 5. Nxe5+ Ke8
The Database has 2,256 games with this move. White scores 58%.
"Best" seems to be 5...Ke6.
Likewise, The Database has 1,356 games with this move. White still scores 58%.
7. Nxg6 Bg7
This Bishop moves seems, at first glance, to be a practical response - arranging to capture White's Knight after it takes the Rook at h8.
There are three things wrong with this move, however: the game continuation, the recommendation in the notes, and the straight-forward capture 7...hxg6 (best).
At the very least White is now going to wind up ahead a Rook and 4 pawns. That is more than enough.
However, in all fairness, he also had the King hunt 8.Ne5+ Ke7 9.Qf7+ Kd6 10.Nc4+ Kc5 11.Qd5+ Kb4 12.a3+ Ka4 13.Nc3 checkmate.
Holding out longer is 8...Ke7, but why bother?