If you want to get into proof, here is proof that I got the inspiration for Eduset exactly a year earlier than I signed up for Edmodo: http://grab.by/5A5
Also, it is painful for me to see you painting me as a villain here. Why are you implying that I'm not "putting my money where my mouth is", that I'm not also trying to make the education community a better place? As I said above, you are planning to launch paid features, so please don't try to make it seem like I am doing teachers a disservice by charging a small amount.
By charging for your service, you're actually rather protecting your users — a free service is much more likely to suddenly disappear from the face of the web when it's too far into the red. And certainly, that wouldn't be appreciated by those users who have come to rely on the service. Maybe you should even put that into your marketing copy: it not being free is a feature.
Also, it is painful for me to see you painting me as a villain here. Why are you implying that I'm not "putting my money where my mouth is", that I'm not also trying to make the education community a better place? As I said above, you are planning to launch paid features, so please don't try to make it seem like I am doing teachers a disservice by charging a small amount.