I have not used it too much, but I have got very very few messages that even have ads. If I remember correctly, Google said probable only around 20% of emails would ever have ads - and those are just small ads on the right hand side - no pop ups or nothing like that.
(hide) Want to play more games but you're having trouble decide which game to start? Enter a tournament with random games. (pauloaguia) (show all tips)