Same here, I've never actually seen the term "clanker" be used in reference to a person using the AI, but the AI itself. Which to me was analogous to going to an expensive bakery and accusing the bread of ripping you off instead of the baker (or whoever was setting prices, which wouldn't be the bread).
If there was any sort of op going on (which I don't think there is), I'd guess it would be from the AI doomers who want people to think of these things as things with enough self-awareness that something like "clanker" would actually insult them (but, again, probably not, IMO).
From what I've read (granted from other reviews), the limit would be the equivalent performance of 8 4090s. Which means (assuming we believe Nvidia's claims of 3352 AI TOPS for the 5090 vs the 1321 AI TOPS for the 4090) that you couldn't possess more than the equivalent of 3 5090s. Then that keeps going, so.