From the reddit listings, it’s pretty much as I thought - leftover keys dump. Best things in there:
. Graveyard Keeper
. Niffleheim
. Middle Earth Shadow of War
. Esoterica Hollow Earth
Apparently you might end up with a lot of HOG games in the “Adventure” bundle. There also some tiny games in the RPG bundle like Destiny Warriors RPG. All in all, you do it for fun, but chances of getting something you don’t already own from another of their bundles are pretty slim.