From The Pavilion

The team are pleased to announce that Pavilion Membership has now been implemented. While the game will always be completely free to play, managers now have the option of obtaining a 3 or 12 month membership subscription via the 'Shop' link, which will grant them some nice extra features designed to make the game that little bit more fun.
Managers who purchase membership you are helping to cover the (not insubstantial) costs involved in hosting the game and also provide for the development of new features.

Further details can be found on the Pavilion Membership page in the rules.