Congratulations on shipping but I don't understand something. What exactly are you testing with your MVP? Yes, people will sign up for a free service but shouldn't your goal be making money? Don't you need to test that?
Thanks for the comment. Yep for sure, if you read the end it talks about this. So far I have validated people are interested in the idea, got feedback from many users they'd be happy to pay. Next step is to find a financial model, paid or otherwise.