New board sizes for connect 4 would convince me to subscribe, and I know many others that would as well. This idea is VERY simple to implement. All you have to do is change the dimensions of the board for a new size. It would probably take less than an hour to do, well worth the extra revenue brought from subscribers. I suggest you make it a subscriber only option like the popout mode. If you do this, you will bring back players that are bored with the worn out 7x6 board size. This addition would also solve the problem of cheaters that use a program to win games because these larger board sizes have not been solved and no program exists for people to cheat with. 9x7, 8x7, 8x8, 9x9, and 10x10 are the best options. The more sizes, the better, but I understand if you cannot add them all. Thank you for considering this addition.