Online Convention for D&D 5E on Fantasy Grounds, 19-23 September

Is this different than the twice a year FG Con?

Yes. It is only Adventure League (AL) Convention Created Modules (CCC). It is also multi-platform. I looked at the sign ups and the vast majority is Roll20 + a few Fantasy Grounds games.

Giving your product away for free is a way to get market share. Doesn’t generally fill your bank account.

It’s always a question of do expenses drain the account before they figure out a way to fill them without driving away everyone who came for the free candy.