"Player" Medal = no reward is not necessarily true since the implementation of the PRIDE skill !!!
PRIDE = +0.5 seconds per point multiplied by the number of medals you have increase in duration of any potions taken while this skill is active. (Note the multiplier increases based on the quality of the medal. Bronze +1, Silver +1.2, Gold +1.4, Crystal +1.6, Ruby +1.8 and Diamond +2)
since the implementation of the PRIDE skill I started working on getting NEW MEDALS (Treasure Hunter Medal, Fragmenter Medal, ....) + increasing the "tier" of my current Medals so that PRIDE will have a greater "effect" !!!
I got many messages from members & friends to help them get a MEDAL even though they were not interested in playing that game style at all !!!
while I was on the PvP ladder I encountered many players who only joined to get their PvP medal, some of them had a deep "grudge" towards PvP but nevertheless participated in the game aspect they would otherwise "never" have played !!!
I am sure I am not the only one who had this kinda encounter
so yes, I strongly believe that MEDALS will lead to a higher activity / encourage players to participate in "different" game aspects, in some cases even game aspects those players would have otherwise not joined !!!
I really do understand you & your viewpoint on achievements but from my personal experience I think MEDALS will have a greater "impact" / encouragement than the achievements !!!
There is something that I can work with. I would agree with having these medals added if they didn't give the reward structure you stated in your opening post. These medals could then be included somehow with the Pride skill and to add on we could have a Pride guild structure that also boosted that skill or the stats from guild medals or whatever. Just as long as there is no other reward added.