For many of the already stated reasons, I don't offer much as a crafter (2 day limits, and economic viability mostly). I probably put up about 10 armor mods (I provide grade 3,5,8 mostly) per week between my two cybertechs, and though they sell, I could actually be making more on the materials...
Mostly, I just end up crafting for myself and sometimes giving stuff to people I group with though.