I'd like to make some observations (not that i doubt what you wrote, but to adress other aspects).

Red Ice did have 330k+ on yt, but how many of them were regular listeners? I do not remember their regular videos in the 100,000+, apart from some small 5-10 mins videos. Keep also in mind that they were on yt for years, and before 2016 they had a totally different content. 40k on bitchute is a really good number. You say they get only a few thousand views now, but keep in mind they use a lot more platforms now, so you have to add up everything (bitchute, dlive, lbry, their own site etc). But you are correct, there must a reduction in numbers, although not of orders of magnitude. Regarding the site traffic, i had checked recently (a month ago) and i saw it soaring; now checking again it is indeed decreasing. Taking into account the small number of people though, it could be temporary/coincidental.

I don't know about this site in particular. I see AmRen around 100k, which doesn't seem too bad for dissidents.

SPLC numbers don't mean much i'd say.