Oh I agree, I make software for a living and dabble with games for fun, all my other game making software comes preloaded with Ad libraries and it would be great to have GameGuru be able to do the same, but in all honestly with an already saturated games market its hard to make money, my out look is to make a game that gets talked about and shared, give it away and reap profits from website visitors using AdSence, offer updates and incentives to bring people back to the site, load pages and keep the pennies coming in ..... it can turn a profit, not a huge one but better returns than banner ad's on mobile devices (im my experience anyway)
all we really need from TGC to make this happen anyway is some HTTP functions in Lua, it would then be down to us to write API interfaces for our desired ad network, I'm not even sure if any allow embedded ad's within games but sponsorship's would require some sort of communication, but in the mean time consider AdSence, as long as your site is getting traffic then you are earning money, make a free game that goes viral and suddenly your site is worth a whole lot of cash!