Vanity hashes are hardly anything new, 0xB10C has done a similar one (see https://b10c.me/7). I don't have any mining infrastructure, and I don't think you could even use it for vanity hashes. However, 5 custom bytes isn't that expensive, it took me around a month on a relatively recent CPU.

vostrnad

which is very expensive to do and takes a lot of work

Which suggests that tx author has mining infrastructure that was used to produce this? I am unclear if sha-256 ASICs are the right tool for this particular type of hashing?

bitcoin

Analysis of 0xB10C's weird bitcoin transaction

supertestnet

> which is very expensive to do and takes a lot of work

Which suggests that tx author has mining infrastructure that was used to produce this? I am unclear if sha-256 ASICs are the right tool for this particular type of hashing?

Are there many other examples of ***vanity hashes*** out there, or is this something new?