Heya -
Okie, to try to explain this more...
We (MySpace) are not currently planning any type of revenue share program for anyone monetizing their canvas page. Smalto2 has a perfect description above.
That said- we have a self-serve ad platform we're working on (the hyper-targeting piece basically just means you can target ads really well...ie: serve only to girls over 20 interested in dogs. At some point, that'll be open for devs to use if they want...only if they want. No idea yet how the financial model works around the ad platform.
"Cannot send ads directly to application" - Basically, no ads on a profile or home page. Same rule we've always stuck to.
All good questions, keep 'em coming! :)