Facebook Wants Game Makers to Develop for Its Platform — Or Else

From the actual policy writeup:

https://developers.facebook.com/policy/

Mobile Web Apps that are running within the Facebook iOS app must not accept payments. In particular, these apps must not reference, use, or otherwise encourage the use of Facebook Payments or other non-iOS approved payment methods. [clearly to keep on the right side of Apple's policies]

...but also...

Games on Facebook.com or Mobile Web must use Facebook Payments as their sole and exclusive payment method for all virtual goods and currencies made available to users within the game.

This seems to make mobile web games, which do anything (like notifications) through the Facebook iOS app, unable to use any payment mechanism.

Or is there a way to thread this policy needle?