If people are paying for something from a company, those people are usually very happy when Google buys that company because Google has a history of making things available for free which were not free prior to being bought by Google.
This has now happened with FeedBurner. Two FeedBurner services which previously had a fee no longer cost anything. TotalStats and MyBrand are now free. People need to activate these in order to take advantage of them.
FeedBurner Stats PRO is really useful. You will be able to know how many people viewed or clicked individual content items in your feed and estimate the daily number of subscribers who interacted with your feed content.
There are more details and you can see them here
Burning Questions • FreeBurner for Everyone