I'm a long time friend of Adrian Ling (creator of easyClickMate), and a lot of people know that (he was also one of the first 10 JVNotifyPro partners) ... but I'll try not to sound biased.
easyClickMate is a great way for a Click Bank merchant to run his Click Bank business ... one of the best, IMHO.
But with the invent of the Butterfly Marketing script and others like it that feature O.T.Os and other options that favor today's Marketing environment ... low ticket new product launches seem to have leaned toward these scripts to maximize sales for the short term ... get in and out. ECM users seem to be more the simple business owner in it for the long term without all the hype and flash ... a simple system to keep their business organized for the long haul.
I believe there is a market for both types of products ... and you'd be just fine using either.