Can anyone explain the purpose of these kinds of transactions?
It's an "Inscription", people who fall for that shit aren't the brightest

I can only conclude they must earn a lot of money from this
idea they're selling to gullible people.
So they want to immortalize themself on the blockchain with their entry?
OK, I've found a tool that shows the "inscription".
https://ordinals.com/tx/bd9d7c255bad5a51e09ad535f55b51ab19054489b8e46cc24f47a127a5058593But honestly, that is very stupid
(sorry). In particular the image...
And on top of it, it has nothing todo with the purpose of the Bitcoin blockchain.