You can't log in on it, but if you just need to browse and subscribe to some that still aren't on Lemmy, try Stealth and go into the settings and change "Reddit Source" to scraping.
They warn that it could stop working at any time since it's basically a hacky workaround, but it's decent enough for now and doesn't use their API at all. I mostly avoid Reddit now, but it's nice for the few times that something's on there that I need still
If you're concerned about payment info, some VPNs like Mullvad let you buy a voucher/gift card from Amazon so they dont get your payment info, and you don't have any account info, just a randomly generated number no email/password stuff.
That way there's no payment info tied to you, and no account login tied to you either, you just have to memorize/note down the generated number