You get an icon to "thank" at the bottom right of every post, I believe that you have to post 15 times before this option becomes avaialble (but it could be 25).

I believe that graduation occcurs as you achieve a higher number of posts.

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Mike
London City Presbyterian Church
London
England

"Surely, we wish to be orthodox, but we must first learn what real orthodoxy is. Surely, we wish to be progressive, but we must first have a basis to progress from."