Furthermore, this is an inherently unsticky kind of niche. Every customer will need to be won over again in 12 months or less, as they tire of that one charming game.Full agree with this statement. If you look at titles like Candy Crush, sure, they're doing amazing right now, pulling in huge numbers (users and revenue) - but in 3-6 months - they won't be around. Retention will switch over to the next 45th copy of Bejeweled.
It's actually a very interesting model. The same games are re-created by new "startup" companies every few months. 1/100 hits and becomes a Top-10 item in the app store. The game gets huge traction by leveraging FB's massive user base, company puts together obscene numbers showing engagement, in-app purchases, growth projections (which end up diving after a few Q's) and then go out and raise Series-A rounds.
What I CAN'T figure out is - are VCs really this dumb to invest in companies that won't be around in 12-18 months? Maybe they're not, maybe it's the VC model that's flawed. Invest in 100 companies @ $1.5-3M per and 1 will go public or get acquired and we'll make our money back. But this is an entirely different conversation.