I think there should be a reward for completing all 3 wanted monster on top of the individual rewards. I mean some weeks the big wanted monster is crazy to find/seal etc. So I think if you did all 3 there should be a bonus.
I think we can use more silver coins for upgrade use.
How about extra 25000 silver coins if all 3 are completed?
I think more like 100k silver would be good, it would give more incentive to find those hard ones. People might even spend for coins for eggs etc. Its a win win scenario!!