Usually given to certain former staff on MPGH, or people who show great value/contribution towards this community.
In terms of how many thanks, it does not help you towards gaining the title of "trusted user".
If you intend on getting it to scam, I don't think so.
If you intend on getting it just for the sake of tag hunting, I don't think so.
Nonetheless, there will be random polls by an administrator for selecting potential "trusted members".