@EmperorNero,
Welcome, NoemperorNero!
The "Thanks" feature is basically a way of expressing appreciation for a post -- it could be because you appreciate the knowledge provided (content), the clarity of an argument, or simply because you enjoy the discussion. The feature is open for interpretation, some thank more often than others, and it's certainly not required.
Anyway, don't hesitate, join right into one of the many discussions!
I hope you enjoy your stay,
Zeth