No, in this case that is the full extent of what they are providing. The digital goods make no use of any of the software platforms Google provides. Google is not hosting the goods or footing any bandwidth bill for their delivery. Google does not review the goods individually for approval into the store. The only thing Google is providing in this transaction is billing, and access to a captive market that they have no moral right to act as the gatekeeper for.

From the article:

" That’s because, while Google expected apps to use Google’s own billing system for purchasing digital goods, it rarely actually enforced the expectation."

"But Google is currently cracking down on app developers skirting around its rules. Starting June 1st, Google said it would remove apps that didn’t comply with its billing system rules. "