Hello L Doble:
I will follow people for several reasons. For example, if the person shows a capacity for thoughtful and intelligent communications (like your topic here) I will use the FOLLOW feature to allow private contact.
The Follow feature also is a way of expressing "admiration" for what someone writes.
It also permits me to offer my services in practicing English and offering lessons to person that I think I can help.
Normally, new members on Italki do not simply contact me for help. The contact process works this way. I will see a new topic whereby a new member introduces their status as a student of English.
(I do not always respond to those who indicate that they want "friends". Sometimes those people are not serious students of a language. )
If a person offers a sincere interest in studying, I will usually use the follow feature.