If Badspot DID go through with updating the engine, it shouldn't be a separate entity, how many sandbox games even get a full on sequel?
He'd be putting in the same amount of work if not somewhat less if he were to update his current game with a new engine than to make a new game altogether because of the additional work it takes to getting it to be sold digitally and getting it on Steam
And a "well-made" sequel can't even exist without any sort of mass-fundraising, which, in that case, we'd just be better off fundraising the engine update/overhaul
So like, 75 people?
This is also another issue, many people said that they would pay money to upgrade the game, but it still wouldn't be enough to get Badspot going, and who knows what kind of incentive it would even take to do that...