Does mine and Chasca's Avatar Request thingy count as a business? We don't earn anything from it, be will still provide things occasionally. If you get what I mean
I would love to say FC Inc. But i havent had enough activity for that, so i would like to nominate AlexChance Incorporated
Deathtomb, FC, Alex, Shavingfoam, Todd's place, Leowaste, RandomZ, Manic_Miner, Pab10s. These are the stores that come to mind.
I am gonna go out there and say that my supply company is quite popular. Maybe not as popular as Kad's, but it is very similar and I have had a lot of orders, most, if not all with good feedback.