While I agree entirely that they're not free per-se, if it weren't for them, there would be nearly nothing to post for anyone who doesn't want to use the Epic Games Store.
Lemmy communities are already at a disadvantage to subreddits in terms of attracting and retaining users, so I don't think fracturing communities further than they already are across instances is beneficial.
While I admittedly haven't tried using Arctic's regex filtering options yet, if other Lemmy clients have similar functionality, I would imagine a filter for any post that includes "[Prime/" or "[Prime]" in the title would automatically hide the posts without the need for community fragmentation.
Unfortunately there doesn't seem to be a third-party email program with functioning gesture support. Trying to switch to Linux before Windows 10 is deprecated myself, but since my grandma uses a Surface Pro in tablet mode, I opted to just install an older version of the Mail and Calendar program on Windows to remove the redirect-to-outlook component, with Microsoft Store auto-updates disabled.