Yeah you really can't beat the engagement, that's our main goal with it actually and the prizes at the end are more of a bonus than anything!
Believe me, have had plenty of posts that have gone without comment! Things seem to be a lot better now and a lot more engaged!
You'll be getting loads of medals at the moment with Hivebuzz! It's when the notifications and badges start slowing down as you are here for longer that's when the medals feel like they are earned properly haha!