It seems that there is some modified private miner for XMR because I believe this is the 3rd person in the past couple of weeks that I noticed that is offering to pay more than market rate for CPU mining.
Not for XMR, it's for some other CPU coin with different algorithm.If it was regular RandomX he would just go on Nicehash and rent tons of hash there no problem. He says its for some modifed RandomX algo. So its possible its another coin however what is the difference between his randomx algo and the regular algo? Most likely the modified one is much quicker.
So someone has an advantage here and they want to lease as much CPUs as possible to take advantage. However the smarter thing to do here would be just to release a closed source miner and charge a miner fee. If the speedup is large enough then many people will switch to the new algo because it wouldn't make sense otherwise.
