I am not sure what is an alternative, but I would be open for anything, really. I wouldn't want you to get effected by Paypal. D:

I appreciate your support
I will of course let everyone know if my own research turns up anything useful

Ko-Fi seems to be the prominent alternative at the moment, but they also have a vague policy about nsfw transactions, their punishment is just not as frightening as Paypal's threat to charge accounts 2500 USD per violation in their activity.
Will keep looking!

You are welcome! I love to support ya! <3

Ko-Fi I haven't seen anyone get in trouble there. o:

I've seen other people using Stripe successfully, but I'm not sure what geographic restrictions they have, and I don't have any experience with it aside from as a commissioner. (It's pretty nice for that! But that's only half the story.)

Stripe is another one that seems highly recommended! I will definitely look into this, thank you!

PayPal blocks have forced Russian users to switch to Boosty, which I've paid through before, but I know nothing about the registration process or if there are any usage fees. There's also Square. You can do Venmo and CashApp if you really need to. Payoneer. I'll tell you in advance that I don't know if there are policies against NSFW on any of these, but they're alternatives in general.

I understand clients are typically hesitant to use anything outside of PayPal (I am as a buyer and seller, too) because of PayPal's buyer protections, but you're established, so hopefully most clients will be less concerned about using another service.

Edit: There's another artist I watch who mentioned in their journal that they're moving exclusively to Stripe and their clients seem supportive.

For the sake of sharing my thoughts so far!:

Stripe is starting to look like the best option... Will do more research and report back if I find out anything heinous about Stripe's user policies!

CashApp, as far as I know, is a big winner for US based transactions because they have no way of linking payments to online content like Paypal does, with all its fucking money to spend on stalking creators and clients online.
But I really don't like the idea of using phone numbers as a transaction avenue ಠ_ಠ

Venmo is another good looking one but its transaction fees are a little steep. Same goes for Square. Mostly because these apps were designed for use by small businesses and not solo online content creators. Using these guys might mean I have to raise my commission prices, and I historically try to avoid that.

There's a new policy about NSFW? What did they change?

The policy isn't strictly speaking new, Paypal has had restrictions on the sale of explicit or """obscene""" content via it's transaction system for years, but previously as long as you weren't attaching any files containing pornographic content to the invoice you sent from Paypal to a client, it was basically impossible for the site to catch you violating that term.

this year they've ramped up efforts to trawl sites like twitter, tumblr, and deviantart to link email accounts and usernames to transactions on their website that would have involved the exchange of money for nsfw content. If they catch you, they'll fine the seller 2500 USD per violation, which would destroy most nsfw artists that I know who use Paypal for commission payments. Overall, it's safer to migrate off Paypal if you plan to sell nsfw content, but because this site has been the mainstay in online transactions for a literal decade, there's very few solid alternatives.

I see, thank you

And yes, I know there are very few alternatives.. Paypal is basically the only one allowing global trading with smaller transactions. I know many use websites like stripe, but as a commissioner, I don't like country-dependent traders in case something goes wrong

I have used Skrill for sending and receiving money in the past, but I don't know if they support invoicing or what their policy is regarding NSFW.

Skrill came at the top of a few lists for simple online transactions!
I don't know much about them yet, but at this point we might just have to throw our hat into someone's ring and hope they evolve quickly to fill the hole Paypal just shot in its own foot.