RSS Aggregation stats from Google, previously Feedburner.
https://feedburner.com
Syndication Techniques
Get access to data on 184,264 websites that are Google FeedProxy Customers. We know of 2,824 live websites using Google FeedProxy and an additional 181,440 sites that used Google FeedProxy historically and 1,841 websites in the United States.
Get a list of 184,264 websites using Google FeedProxy which includes location information, hosting data, contact details, 2,824 currently live websites and an additional 2,838 domains that redirect to sites in this list. 181,440 sites that used this technology previouslyand 1,841 websites in the United States currently using Google FeedProxy.
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