Basically every tour was available since concert tour 2000 minus AT18/PoM18 and then two random CDLs from the last few years were part of the poll too.
Maro was in less than half of the top 10 though. However, Ayu could have always just said no and skipped over something if it did have him like how they skipped no.2 and went to no.3 for the next commentary.