I'm wondering whether I should pay for an autoresponder (aweber, mailchimp, etc.) or get this auto-responder email plugin. (link to woothemes.com) I'm running a woocomerce ecommerce, and this plugin gives the option to generate & send coupons which in my opinion is a great option, however the license is a bit expensive (~$149 for up to 5 websites) On the other hand, autoresponders are quite cheaper, usually around $15/m, but they are not built in my website. Have anyone tested the plugin I'm talking about? Could I ever get a problem for sending too many emails, in case my list becomes too big? Thanks for your help!