Imo - if you want to make money publishing your writing online, you should go the independent route. Currently, I'm writing on Kindle Vella. It's not a perfect platform and the money isn't guaranteed (but what platform is), but I get paid for every reader. They'll pay me that even if I only make $0.50 USD in royalties. Their only stipulation in our agreements is that your work has to be behind a payment wall. I have full rights to my work and can release it as an ebook if I wish. I am not a fan of Fictionate because of some personal issues with the CEO, but even with that site, I own the rights, and if a reader pays the $4.99 fee for the book, you get $4.99 for the book.
The problem I've seen with other online publishing platforms is that they hide predatory clauses behind flashy promises. Web fiction is the future of publishing, so many sites are popping up trying to grab stories. Wattpad, for example, is creating pay-to-read serial fiction options but there is nothing online about the TOS of their programs. It's all "invite only". That's a big red flag to me. Other sites like Inkitt promise to help you publish, but they only want spicy romance and will take ownership of all your IP. Writers get no money out of the deal.
If someone wants to support your work, they'll pay for it. They won't offer you something that seems a little too good to be true, which 99,9% of the DMs people get with flashy offers are too good to be true. Play it safe and shop around before committing to a publishing set up.