larian could at least allow for buying the electronic addons via paypal
I think it's been said that it's too difficult to link a Paypal pledge to a Kickstarter pledge. There are over 42,000 backers to deal with, and rejigging pledge management systems for small edge cases is a huge hassle.
34,397 backers for star citizen on kickstarter and look how adding a post campaign pledge store worked out for them. Hint they have now over 800,000 accounts. It really is not that complicated from coding perspective.
Though in case of divinity a post campaign merchandise and pre-order store might actually work better. Keep accepting pre-orders for all those nice addon goodies from the kickstarter campaign sounds like a really good thing to keep increasing budget and make backers happy. People like to throw money at Larian and people like as well getting small goodies from Larian.