create sets of icons by industries/topics
I'll propose to you what I have proposed to FontAwesome before. 
Create sets of icons that are useful for developers, by industries/topics: transportation (trucks, trailers, gas pump etc), accounting (assets, liabilities, bank, money, check, visa, invoice, etc), project management (project, task, tasks, user, employee, deadline, manager, budget etc)
I think you get the idea. Organize them like this and you'll find success. Taking individual icon requests will waste your time and make FA unusable