I believe Raz is currently messing with the ads and changing which ones display, so there might be some weird or annoying ads here and there. If you really don't like the ads, you can always get AdBlock. You'll have to download it differently depending on the browser you use, but for Google Chrome you can download it directly from the chrome app store. However, by having ads enabled, you are helping out the game, but having adblock or not is entirely your choice.
Sorry to hear the ads are annoying you, though!
