They already have one where the put most of the prime games called “Amazon Games App”. So if “Vapor” is something new it is more of another another launcher.
If they however just update the game app to also be a store front, it be fine I guess. I’m not thrilled about everyone needing there own launcher, but Amazon already has one, so can’t really blame them for spicing it up a bit, to be at they other launchers level.
Look at the bright side, at least it doesn’t require you to be online to open offline mode, and then have offline mode throw a tantrum because it doesn’t have an Internet connection…