Please don't make pyramid quote, it's hard to read the thread
If everyone who ran full nodes stopped running them, then the mining cartel would have absolute rule over the network. What would be the point of Bitcoin? Haha.
From more technical side, there's no way miners would run lots of node or use very powerful hardware which act as server for all kinds of SPV wallet/protocol.
And where do they cash out? - no KYC ?
DEX is an option if they're willing to cash out slowly.