Marketplace 4.10 content updates requested

I’ve noticed that the Animation Starter Pack published by Epic still hasn’t been updated to be compatible with 4.9. Is this an oversight, or is the pack being made obsolete?

Also, what recourse do those of us that have already purchased asset packs that then get delisted have? I say this because the one asset pack I bought (SciFi Weapons Dark by Adia) has still not been updated for 4.9 compatibility. As it currently stands, I’m a bit discouraged from purchasing any new packs in case they suddenly vanish.