These games have always been strangely popular in the west despite being kind of mediocre so this shouldn't be too surprising. Of course it's interesting to see IF International doing it instead of NISA, but ever since they announced IF International I've been expecting something like this. I mean, why wouldn't they localize their own games?
I don't suppose the remake includes the $90 worth of DLC the game eventually had?
I'm honestly not sure about all that's in Re;Birth but it's a pretty drastic remake with a lot of new content, not simply a port, so I would guess that at least most of the DLC from the original is included. There is
DLC for Re;Birth in Japan, but it's all new. Stuff that wasn't in the original version at all, DLC or otherwise.