Earlier quoted context omitted.
I don't think what they're doing violates the law[0], but they could easily subpoena Reddit and find out who the users are if they wanted to. [0]: too complicated to get into here, but basically my interpretation of the law is that you need to be making trades that you intend to cancel or revert immediately in order for it to apply to you, and what these traders are doing is instead speculating on the price going up…
How would Reddit know who those people are? Protonmail + VPN would hide their identities as far as Reddit is concerned, right?
Reddit has stayed true to their word of maintaining the old design, and it's free of the dark patterns in the redesign. Go to https://old.reddit.com/register and just leave the email field blank or if you use the pop-up menu (the thing you get when you click login/register in the top right of the old design), you can click skip on the first screen where it just asks you for your email.