Yes, I believe it’s 10. You can just add multiple responses to this thread I believe to increase your post count or, create one thread on the test board and do the same thing. There is no need to create multiple test threads as some people do.
Just a heads up. I don’t believe there is a need to create a new account when you change email addresses. When you login to your old profile, under the Account Details is the option to change your email address.
If you’re not able to do that you may wish to out a message in the Technical Support forum.
Hope this helps.