FeedBlitz Changes Its TOS – Lists with 5000+ Subscribers Effected

FeedBlitz, a popular Blog to Email service has changed its Terms of Service which come into effect on August 19, 2007.

The two main changes to the terms of service are:

1. Lists with an active circulation of 5,000 or more must be on a FeedBlitz premium service (Pro, Turbo or Newsletter Edition).
2. 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?