Maybe doing that in the cloud would compromise the security of your vanity address. You would not own the private key. Your cloud provider could control your domain.
(Please correct me if I am wrong…)
(Please correct me if I am wrong…)
Vanity addresses are popular in bitcoin, but difficulty rises exponentially with each character. Most people don't want crunch random numbers for 6 months. The solution to 3rd party key generation is split keys.
Essentially the addition of keys to get the desired final key.
Generate key X, give X public address to cloud provider, they search for key Y so that X + Y == YourVanityAddress, when found they send you private Y. Private X + Y is your vanity private key.
Vanity address generated by 3rd party in a trustless environment.