Well, it was for me. I read the blog post and decided I wanted to try it until I had to add my cc details on the sign up form. If you are providing a one month free trial why on earth do you need them?
To be fair, though, I’m largely in agreement with you in this case. For products like cloud infrastructure, where the company is fronting real costs, the requirement makes sense to prevent abuse. But this product has low marginal cost per user, and also loses all of its value if a user recreates his account.
Unless, of course, you could import historial data somehow. But then maybe just make that feature not available on trial.