First up great plugin. I use it on all my sites and works great.
I've just installed one of the best insite Advertising platforms called OIO Publisher which allows automatically selling advertising including inline text links. The platform allows follow and nofollow as advertiser option choices.
I was wondering whether there's an easy way for the developer to interface with your plugin so that any purchases of dofollow links can be added to your plugins database of exclusions? Is it just a matter of adding one to a particular database table and when the purchase expires, then remove the URL from the table?
Any help would really be appreciated.