GetResponse says they have hundreds of thousands of customers. And from my interactions with online marketers they seem to be pretty popular. Yet strangely, I have only come across one email designer/coder out of all the ones I've looked at who even mentions experience with GetResponse. And I've asked every designer/coder I've talked to personally and not one of them has any experience with GetResponse. Some of them were barely familiar with it at all.

It seems like almost every designer I come across is very familiar with MailChimp. Many are familiar with some of the others. But only one even mentions GetResponse.

Does anyone know a designer/coder that has worked in GetResponse? Or, if not, any idea why there is this seeming complete lack of such?