Discord access is free, by subscribing and connecting your SubStar acc with discord you get a special role, access to hidden channels and some other perks, but everyone can join
By subscribing I meant you going to devs SubStar page and joining the subscribers for as little as $5 monthly, you'll find a link on itch main page just below the screenshots at the top, you'll need credit/debit card for the payment to go through, once done join our discord and go through onboarding, there'll be info on how to connect discord and substar accounts to get some perks
Cheers