Yep! It's exactly the same as the version of Breakdance that we sell. It just won't let you save any further changes to your pages after 30 days.
Buy it with the link above. Put your license key in at Breakdance > Settings > License in the WP admin, and you can then keep using Breakdance.
Yes, once you buy Breakdance, you can keep using it. It won't "revert" to trial mode if your license key expires. You just won't be able to get support or updates.
Yes. We do know that you could figure out a way to circumvent the trial. But we trust you. If you love Breakdance, please do the right thing and buy it.