while i guess tapas could reach out to big creators publishing on their own, and stock some of their work too, it makes perfect sense that this scheme would focus on creators working directly with tapas. those are the people whose quality tapas can vouch for, and i imagine makes the legal side a lot less complicated. as for copyright and revenue, surely it would just carry on along the same deal as before in the contract?
i think tapas going into cons would be a really good thing, however they do it. they're already getting started on that, aren't they? the complication to bringing print copies of comics is that people might come to expect that generally, when tapas is still an online publisher. maybe they'd be better off bringing merch they sell - although, still, if a creator they work with has their own hard copies to sell they can always come up with a deal there (say, 'creator gives tapas x many copies and they split the profit so that tapas gets a promotional cut')