The two main changes to the terms of service are:
- Lists with an active circulation of 5,000 or more must be on a FeedBlitz premium service (Pro, Turbo or Newsletter Edition).
- Ads will be inserted into subscriber emails for lists with circulations of this size until such time as they comply
This is indeed a surprising change, though their reasoning for the same makes sense.
This could see a major changeover from FeedBlitz to maybe Feedburner. However, migrating huge lists can be a bit of a problem.
Are you affected by this change?