I am almost a mirror-image of you regarding Reddit, except to me Reddit was Apollo rather than RIF. I too have cancelled Reddit Premium, which I paid to support a platform I used a lot. LIke you I am trying out the fediverse via lemmy, kbin, and mastadon; and, like you, I am enjoying mastodon and using it much more than I ever used Twitter. Finally, like you, I have gone back to RSS feeds and old forums I used before my Reddit habit overshadowed them. And other people I know are doing the same, albeit they tend to be the more techy inclined.
I also cancelled my Reddit premium. I was using Apollo so the no ad thing was not a factor and I never used my tokens. But I used reddit a lot over many years and wanted to contribute. Currently I am avoiding reddit and trying out Lemmy. Will decide before Jun 30 whether to delete posts/comments/account. I have also resrrected an RSS app which I had not been using for quite a while.