Awesome! So glad to hear that!
So, first, let's go over what Itch.io does and doesn't have in comparison to Gumroad!
Gumroad has a lot more brand recognition, their back-end is a little faster and more streamlined (you get paid faster with Gumroad, this is just a fact) and Gumroad tends to seem to be a little easier for people to use, for whatever reason.
But, Gumroad doesn't allow any NSFW material to be searchable (this is a problem I very specifically have) despite the site being riddled with front page nudity, and has had a history of taking down people's comics and products unfairly. I only use it because people ask me to use it, and again, brand recognition.
Gumroad also has much heavier restrictions on what can be made available for free-- if you want to offer something for free, it's GOTTA be tiny, which isn't always easy to do in a image rich PDF.
Itch.io allows anything to be free! This can be a boon because you can offer something for free but enable tips for people who like the comic or who might want something a little extra. This is an extremely useful feature for comics that can already be found free around the net!
In the end, I still think it's smartest just to use both sites. I've always found putting my work in lots of places helped me find new people, but most importantly, it protected me anytime a site died. I experienced this with both Tumblr and Smackjeeves, and in both cases I was so glad I had made archives and was active on other sites.
Now, let's see what Itch.io has that Gumroad doesn't!
Itch.io has a community, a way for people to rate and review your product (this will then show your product on their profile for all of their followers to see, very useful), and a way for people to comment on your product! These are all GREAT things! This stuff can help boost your stuff up in Itch.io searches and help you to find a new audience that wasn't there before. I've found many new fans just through Itch.io!
It's primarily a game based site, but I find people go there to find hand crafted indie stuff, first and foremost. Which I think is a great advantage to smaller creators. People who like indie games like visual novels also tend to like comics, I've found.
Itch.io also allows you to make a custom landing page for your product, which is something that is so rare nowadays. With the death of Smackjeeves, Itch.io and Comicfury are probably the last two sites that I know of that allow your comic to have something like this for free, it's so valuable. Your Itch.io page for your comic can be a bright, fun, colorful hub of work. It can host PDFs, links to where to follow you or to read the comic in the future, and it can be a great place simply to show off the art for your comic too! You can make a banner, show some comic pages, and show off character profiles too.
It's really fun, and again, a nice way for you to add another place where people can find you and your work, and for Google and other search engines to find it as well.
As an example for some comics on Itch.io, here's a list!
My webcomic Space School (example of something a little more complex)
Smaller comic of mine (a page that's a bit more straight forward)
Lots of comics go even more simple than that, with almost nothing on the page.
But, I would suggest checking out the comic tab on Itch.io, browsing around, seeing what you do and don't like, and getting familiar. It's okay to look at someone's format and take inspiration from that, just don't copy someone's page word-for-word.
As long as you've got a PDF you wanna sell, some example pages, and make sure you put tags in when you create your comic, you're golden! The site might seem complex at first, but once you get used to it, it's pretty straight forward.
Er, I feel I may have lost the sauce a bit on this one, but I hope some of this stuff helps explains the benefits of Itch.io and I hope you'll consider checking it out and even using it! Good luck, and if you have any other questions, I check the forums every other day or so!
