Were they served papers by some federal agency or are they doing this on their own?

I could see the US (where they're HQ'd according to Crunchbase) government scrutinizing these platforms more after the recent news of a Chinese bitcoin mining facility right next to a military base. Can't fault Luxor for complying under threat of losing their business in that case.

Regardless, it's time for US miners to spread out. No more relying on these central hubs. We need more pleb miners and adoption of stratum v2. We need other energy rich countries like Venezuela to start mining more so we're not dependent on 2 countries for 95% of the hashrate.