-Ads that quickly flash for 2 seconds before the 8 second photo snap. "Transformers 5 in theaters tomorrow." Kids have very short attention spans as it is -- this is all you need these days. No more 30 second spots. You have to see it to see your friend's snap, no skipping or blocking.
-Celebrity endorsement snaps. You see a new snap appear from "selena91" or whatever. Open it and it's a quick video selfie of Selena Gomez telling you to check out her new movie/album.
EDIT: To clarify, I mean that if the service is dirt cheap, it'll also be dirt cheap for competitors to pick up where Snapchat left off.
The ad is over almost before the user realizes it's started.
No more conditioning viewers to instantly enter the "how and when can I skip this" mindset. (Tangent: none of the full-window "here's an ad while the page loads" ads work on me; I'm conditioned to instantly hit "skip" and make a point of not noticing the ad itself).
Knowing the ad will be very short, viewers are more likely to not attempt to skip it because it will be done (or very nearly so) before they can do so.
If a user is going to see a given ad frequently, best to get it over with and not turn it into a harrowing experience of repetitive tedium.
There's probably a worthy study of ad effectiveness between the initial awareness of the ad and the cognitive turn against it. Get it over with before the desire to skip begins, or a "I hate this ad" arises.
Just make sure the viewers don't explode from the density & pace of content.
The next step is biometrics. The kinect is a good example. Im betting that is looking to measure pupil dilation, heart rate, etc. if its not already. Looking at an ad and your heartrate goes up and pupils change? Time for these similar ones, ever deeper and deeper into you.
If I can do that, I can sell that info to a vender with an actual product, making myself very wealthy just moving data around. Its even better if Im also that vendor, like in microsofts case with games. Then I cut out the middle man and vertically integrate myself to the moon.
And that's a good thing actually
This is the God damn age of creating value out of nothing! Snapchat is not worth $3 billion, it's been 'valued' at $3 billion but it is intrinsically worthless.
Of course $3 billion is completely ridiculous, but it's a little unfair to say they are worthless.