I'd love to see more merch available.  Beside tee-shirts or bumperstickers it'd be cool to see laptop/hydro flask stickers that are things like site art.  Like being able to buy individual stickers of the different rank pictures.  I'd slap so many of those on things.  Also, stickers of the logo and other things that could be easily made into 3x3 or 5x5 vinyl stickers.  

Mugs would be another neat way to support the site and get my life giving caffeine intake for the day. They don't even have to be fancy. I'd buy a plain white one with the MR logo on it. 

These aren't game play direct suggestions but I think it could be a neat way to engage with players and potential players on a whole other level!