[FEATURE] Leave on note any on users profile

[git-3000]

Is your feature request related to a problem? Please describe.
I want to be able to leave a note on users profile and say thank you for their content but currently it's not possible.

Describe the solution you'd like
Add a box so users can leave a note.

Additional context
In order to combat spam. The user receiving the note can edit his profile and decide how much he would like to charge for users to leave a note on their profile.

[vitorpamplona]

nice idea, public or private note?

[git-3000]

nice idea, public or private note?

Public. I think public would be fun because others could read the note too.
I'd like to read what nice things others are writing about others.