well there are some good news I just received online email stating the above that is a good idea if you have a lot of subscribers like the ones with not a lot of traffic but for some amazing reason they have like 500 subscribers check this out.

“3 unique solutions that allow you to  keep your current feed address (including
FeedBurner!) when running BidVertiser ads for Feeds:

1. WordPress Plugin to allow you to seamlessly embed the BidVertiser Ads in your
feeds.

2. Solution for FeedBurner that allows you to embed the BidVertiser Ads in your
current FeedBurner address (and keep your Subscribers Count!).

3. Solution for Blogger that allows you to embed the BidVertiser Ads in the
footer of each of your post feeds.

All of those great features are now available for you in your publisher control
panel under the Get Feed Widget button (after registering a feed).

More info can also be found at http://blog.bidvertiser.com

You may log into your account using your username and password at:
http://www.bidvertiser.com/bdv/BidVertiser/bdv_login.dbm ”