Free VIP Membership for 1 Year (Save $35) @ PromoTix
Previous deal said expired, tried it tonight anyway and account was upgraded to VIP with manual renewal 2 May 2020 so seems to still work fine for upgrading an existing account at least.
Just login then click membership and select the blue VIP option, pop the code in (FREEVIP3) and the price drops to $0.
Don't forget to tick the terms and conditions box, otherwise you can't continue.
I'll assume it still works for new accounts too.