The intersticals are WAY too frequent. The create a very negative UX. Three times I have deleted the two ads from my inbox, only to see them return next I check my messages, and not once have you served me an ad for a product I might in which I might be interested. The games are of the lowest quality and, come on, why would I buy a dog walking kit - examine my profile would tell you I don't have a dog. Both types of advertising efficacy are rapidly diminishing. Put in a little effort, improve the ads and the UX, and promise you will earn more money (even if the strategy is to force people to buy subscriptions:-).
I speak from authority, I helped pioneer digital advertising at Flycast, later at Adify, created cost per action, search advertising (AdWords), and ran one of the first social networks (Fortunecity), growing it to being the 9th most trafficked websites. And I was just getting warmed up. Seriously, I promise better higher customer satisfaction, improved Business performance, and putting you on to a path to net profit aka bigger bonuses and higher stock value :-) if you treat your ads as a product, manage them fastidiously, the metric being customer satisfaction. Bye.