bad idea. why? because before i've made "eye scan" over other versions and chose covers with biggest rating (ofcourse, if they had a lot of votes, 10 and more).
now with this "thanks" button:
1.) we dont have any "score" yet
2.) how the hell will i know cover "real ratio"? all what i can see is how much ppl press "thank" button and NOT REAL SCORE (4.8/5.0 fir example).
from now ill need to open *every* version of cover and judge myself. this will make a lot of wasted time for me and a lot of bandwith traffic for your server.
if you really want to continue with this "thank" button, it would be nice that users could *chose themself* what they can see (rating or thanking). or maybe even both options.
Kivi22, member of the best cover site on the Net

. Thank you marker, CountZero and all other great covers creator for your effort!
