Martin Thanks,  and absolutely love this home you have created for us, but if you make it to high, we will not grow.  A lower, maybe even voluntary contribution, with encouragements to do so, would be more profitable in the long run for Martin as it would encourage growth.  For those of us that are on here a lot, 20.00 would not be bad, but if you think about it that more than any of the individual TV sites, almost double.  ( and if it is between watching women in bikinis frolic on a beach and you bastards....well... you are out)  I think to a newby who hasn't realized the value of the site that is too high.
T shirts, and clothing are a PITA.  I dabbled in that for a while in my store.  I never had the right sizes, the minimum orders were high to get a reasonable price and then when you ran out out of whatever, you would have to reorder a ton of them to pacify one customer.  Might I suggest something mildly wood working related?  Of course you need the obligatory coffee cups and tumblers.....but how about rulers or little squares.....maybe even generated by some of the engineers on the site with 3d or laser capabilities?  We are all creative in one way or another....we can put our heads together to come up with products or even the production.....
Just my .02

Mike