I think that it doesn't make a lot of sense for Google to use Apigee on its own APIs. They seem to do a pretty decent job of scaling, monitoring and securing them on their own.
What does make a lot of sense is a tool to give people who host on the Google cloud better control over who is using APIs they (the customers) produce. For example, you can imagine Apigee expanding to enable transparent scaling of (some) self-hosted APIs onto Google's cloud via intelligent caching.
What does make a lot of sense is a tool to give people who host on the Google cloud better control over who is using APIs they (the customers) produce. For example, you can imagine Apigee expanding to enable transparent scaling of (some) self-hosted APIs onto Google's cloud via intelligent caching.