I have worked with both Hygieenetics as well Ehygenic's for our listservs (both are great products), but when it comes time to do cleanups we always use hygeinetic because they truly understand what needs cleaned up best! The customer service at this vendor was top notch - friendly knowledgeable people who were able to set me straight quickly if there ever needed be any questions about how something should work within my toolkit- which honestly isn't that much different than other vendors out here right now so why would you go elsewhere? One thing though; make sure your budget allows some extra money allocated towards custom reports since one will need them later down stream once things get put together after cleanup/cleanup runs complete etc..
We're using these tools primarily during campaigns where new members sign ups can happen almost daily sometimes multiple times per day depending upon industry being targeted such PPC advertising mostly search ads through Google Adwords mainly.