EC being on GP is great. The game reaches a wider audience, esp. on a platform where it probably wouldn't have performed well. Whereas if you backed, you get to own the game on the platform of your choice vs. merely subscribing to a service, and you get the DLCs for free (and an additional, previously scrapped DLC, thanks to devs getting funding for GP deal), plus a physical copy and whatever else if you paid for that.
I just hope EC's marketing won't be completely exclusive to MS events, if R&B/505 have made some kind of marketing deal with MS in relation to EC being on GP. Since PS and Nintendo non-backer audiences need to be made aware of EC too, as it would probably appeal more to those userbases.
Bit of a side question but can't all or most Kickstarter simply get in gamepass given they money they already got are locked in? Game pass is basically extra cash given (I assume) most units are sold during Kickstarter period and not post launch.
Not necessarily. KS backers almost always total sub-100K, and are usually way fewer than that. Any semi-popular KS and up probably sells 3-10x at and from launch on vs. KS, at minimum.
EC had 46K backers. Maybe a couple thousand more slacker backers. They'll probably sell at least twice that, at minimum.