How do you add your teamcard to your play account and other websites? I cannot seem to do this. Im sure its very simple but no luck so far

Brilliant! I've got one and I'm not even a season ticket holder.

Have you been in contact with "most other clubs" to verify your statement?
Are the Hull FC season ticket holders happy with their teamcards?

Im telling you now next year when your all wearing "unisex" green jumpers you will all be on here giving it the old "oh ive always worn them, they are sooooo COOL!"

Looking at the different companies has anyone joined casino websites where it says you get 1000 points just for joining? If so is it as simple as it seems? As that is pretty good

You could use the websites of some of the 16 or so clubs signed up to teamcard and see for yourself. Some charge a nominal fee, most seem to offer it free to season pass holders.

They get frozen season ticket prices for two years, a half price derby ticket and a host of other goodies aswell.

That is good value then.