Not really. First, it already has over 14k ratings, which is pretty substantial and 24k people who have marked it as "owned". E.g. when Twilight Struggle made i

Not really. First, it already has over 14k ratings, which is pretty substantial and 24k people who have marked it as "owned". E.g. when Twilight Struggle made it to #1 in 2010, it had just 7k ratings. Second, rating decay from the voting population of a game doesn't seem to be that big an effect on BGG. To use TS as an example again, you'd expect that a two player wargame about the cold war would have huge problems as the more general gaming population started playing it. But as the voter numbers for Twilight Struggle increased from 7k to 30k over the years, the rating has actually gone up (8.18 to 8.20). That isn't to say that there's no rating decay in place. But I think the source is when a game is perceived as "obsoleted" by newer games.