A gambit you have never heard of: The Calypso Gambit

Comments on lichess.org/@/thepawnslayer/blog/a-gambit-you-have-never-heard-of-the-calypso-gambit/ADcCGRyk

can you make a study in calypso gambit

Not special. After dxc7 Qxc7 is pretty logical move to keep the complexity of game depsite Qxd1+ being best choice. Such moves aren't that rare.
It's nothing but just a variant of Hartlaub-Charlick Gambit.