Does Ethereum allow split key like Bitcoin does? If not, there's no security added by using an escrow, and trusting a private key created by a third party is just plain stupid.
LoyceV is 100% right. Buying a generated private key is basically paying to get drained later.
Also, the MEV angle is wild. Leading zeros save you some dust on calldata, but MEV is won on latency, not vanity prefixes. We host RPCs and validators at crouton.Digital, and I see it all the time - a bot with a standard address but a lightning-fast private endpoint will out-snipe this 9-zero wallet every single time.
Cool novelty address, but totally useless for actual MEV if your infra is slow.