i think the shop (/warp grass) dosent have enough merchindise and it should . there should be dirt like i farm a lot and i only have so much dirt so why cant u put dirt in? like there should be more options to spend your grass on. thats what i think thanks for your time.
I just realized you cant buy sand and was really surprised. Dirt and Sand must be the only 2 times that you have a very limited supply of. I know you can donate for sand, but it should be possible to get it without spending real money.
Sand though....that's a toughie. I do not support the dirt idea, as you can just turn grass to dirt, but if there was some way for non-donors to get sand, that would be nice, and it would most likely decrease the amount of illegal trade and island farming.
Just use your grass as dirt. The sand idea is kinda meh, since people could islandfarm for more sand, and try to trade it, claiming they got it from the shop ect.. it would be harder to have 'control' of illegal trades.