Andy, instead of making some new plugins, why don't you make "PRO" versions of some that you have. The PRO versions would give full functionality. Most of your plugins don't do what they need to. Honestly, just setting a flag is not enough for most webmasters. You can't check groups, you have to check the whole database. Being able to paste in a list for possible inclusion would be fantastic. And a webmaster with over 2,000 links will just not spend the time. A webmaster with 50,000+ links will just not even try. If you were to get some experience running a Links site with over 3,000 links for income, you would know that many of your plugins need some beefing up to be usable.

Want some income? With PRO versions, yes, charge double or triple.