So the plan at this time is to not copy the user base to the new site. However, you may want to give some considerations to those who have been contributors to Dolphin all these years. Asking them to pay another fee to be able to post; and thereby assist users who have problems or questions with Trident, might not be the kindest thing to do. Also, asking developers who have helped build the Dolphin marketplace to once again pay to help build the Trident marketplace may not be the kindest thing see more to do and may make some developers reluctant to building Trident modules.
I assume you're concerned about the "paywall" that we use here at BoonEx - the $5 one time fee to allow posting comments and forums posts. That's been introduced to ward off spammers and is not collected from anyone making any paid order from us. So far we do not plan to introduce it at the new site and if we ever do, we would find the way to weave it to any "advanced" Boonex.com members, that's for sure.