No revenue estimate for GOG — its rating/review counts don't calibrate to sales the way Steam's do. The Steam version is estimated at $16.1K — a different platform, not this one.

Cash Cow DX

Holy cow, it's all about the moooney! Embark on an udderly moo-velous adventure to rescue Cash Cow's riches from the grasp of those sneaky Pig Pockets and reclaim what's rightfully hers! Get ready for a blast from the past with an 80s inspired arcade experience released 40 years late... Make no mistake - this game is tough as nails! Are you ready for a challenge? Cash Cow DX features… 5 multi-screen levels, bonus stages and secrets player speed selection: normal or turbo (unlockable) arcade, speedrun and marathon modes worldwide cross-platform leaderboards, arcade style delightful chiptunes by Vincent Verger aka Tuï   Tough as nails and no continues but you can play until the cows come home!