I have two IPB Boards.. I have had the opportunity to use IPB Support numerous times, and I have never been disappointed..
Thursday night I put a HTML code in the wrong place, and lost part of the forum and not knowing the Database very well, I put a Ticket in for Support Friday morning... I was fortunate enough to be back up and running within the hour..
You purchase the original license to operate the board.. Now IPB will send you a notice every six months, asking you if you want to renew "Support" cost is $25.00, well worth it.. Support here is the Greatest.
Whether you renew or not, the board is yours. I don't believe you can remove the 'copyrights'. If you do not renew you lose the rights to 'support' and you lose the rights to has any access to the mod.'s that are available, including the 'skins'..But later down the line, you have the right to renew your support..
Tell you now, you'll never find a better deal anywhere..