I have yet to be convinced that, for my particular workstyle / living situation / politics that merchandising beyond books, and maybe the odd sticker or patch, is a good idea. However, if you're into material purchases, I still have some physical copies of minicomics lying around; as of December 2018 I still have about 500 physical editions of THE BIG FISH and maybe 10 or so of AIRBAG #1. Shoot me an e-mail at firstname.lastname@example.org.
If you're more of a digital person, stay tuned. Both a Twitch stream and a Patreon will be entering the first rounds of public testing in the coming new year. I will post dates here when I have them, as well as on my Instagram.