We are introducing a system that will allow players to collect "points" on their accounts by doing various things like subscribing to our Youtube or following us on Twitter and then use those points to get items. Currently we will be using this to distribute our out of cycle Twitch items rather than selling them as we had previously suggested. This allows players to get what they missed before or just get them without going through Twitch.
The first version of this can be found on our account
I'd rather just fix the puzzles themselves to support all the login mechanisms on accounts.klei.com. It's on the todo list, just waiting for one of our web people to have time.
Unfortunately this was against Sony's rules so we had to turn it off on console. Please don't buy a funkopop expecting a skin on PS4, at least not in the short term. Some day....