It was pretty simple... In the first week, a lot of users had just signed up to the various forums, added the signature to their account and then never actually used any of the forums... so, no "free" signature advertising for blender.io as there were no posts So they added in the additional requirement that if you wanted stakes from having forum signatures, you had to post at least 10 messages on each of the forums... otherwise no forum stakes.

This seems to have been too much work (I guess no one wanted to spam 10 messages on 10 different forums) for most people... so only two people qualified for forum stakes... blenderio then apparently decided that wasn't enough free advertising and just called the whole thing off.