The Godley Gambit is a great way to reintroduce some imbalances back into the game if White opts for the Exchange Variation. White may want to suck the life out of the game with 3.exd5. 3...Nf6 invites White to take another pawn where you would get a lead in development.
After 4.dxc6 Nxc6 5.Nf3 Bg4 6.c3, Black has three minor pieces developed to White's one. Even though White seems to have a fearsome Queenside pawn chain led by the proud d4-pawn he will not get it all his own way.
Black can launch a minority attack on the Queenside. When his two pawns disappear, White's pawn chain starting on a2, b2, c3 and d4 will be greatly weakened.