We designed Browshot and Thumbalizr to be very easy to try out. You can create a free account and try some screenshots without verifying your e-mail address. You can even make a screenshot without registering at all. We had some abuses in the past but they did not impact the service. Since free users and paying customers use different browsers, they affected only other free users who had to wait longer for their screenshot to finish. But recently, we had to deal with a different type of abuse.
We have disabled the fake accounts and strengthen our registration process and demos to avoid further abuses. We did this without making it harder for legitimate users to test out Browshot or Thumbalizr.