Previously your profile URL would be automatically generated when you signed up and would be something along the lines of vitaely.me/profile/4K6y8GFtKAbn6r34EtRM2bnQQpq2 (not a real example) .
A few users came back with the suggestions that the URL should be customisable and should sit on the first-level directory of vitaely.me.
So from now on you have the option to choose a profile URL like vitaely.me/aaronbutler.
I have also made it a requirement to be on the premium plan ($3/month) in order to do so.
We'll see how this affects sign ups and potentially any upgrades in the coming weeks.
Here more about it here: https://www.vitaely.me/blog/how-to-change-your-profile-url