I'd be all over this, assuming they had some caveats that would make things like Archive releases and potentially slight variants things you could opt out of.
I pretty much want one of every new figure they create, but would prefer to have the option to pass on endless Clone/officer/trooper repaints, etc. I don't need clean R2-D2, muddy Dagobah R2-D2, snowy Hoth R2-D2, etc. As long as Hasbro didn't abuse this with variants I couldn't opt out of I would love this service.
This would be ideal for collector friendly (but less consumer friendly) stuff like Hammerhead, Walrusman, Yak Face, the last of the Rebels crew, etc. If they could crank all these out on a consistent basis I would love it.