Talk:Custom Game Engine/@comment-71.8.126.68-20130926010045/@comment-96.51.201.54-20131005065452

Gives you a small monthly income from that engine, like what "Codename: GRID" does. Not enough to let you coast, but better than nothing.

Dunno if multiple engines with it will give you multiple incomes, or if only your most recent engine gives you income. Though I'm pretty sure the amount of the income is based on the cost of the engine, so a zero-feature engine will give you zero income. :P