User blog comment:MemesAndMore2007/Should Robux at least have a way of being earned for free and not being purchased?/@comment-37748506-20190903220933/@comment-35998649-20190904180025

There's always opportunities to make profit, such as by making a game and monitizing it (remember that Roblox Studio is free to download and there's no paywall to use it).

Other opportunities exist like:
 * Making GFX (Blender is a free program that's good for GFX)
 * custom meshes for developers/your own projects (Blender as well)
 * Custom art like thumbnails or game icons (paint.net and GiMP are two free programs for that, also if you're very into drawing paint tool SAI exists and has a 31-day free trial. after the trial ends, saving and opening functions are disabled).

Trust me, developers will pay Robux for this especially if they think it's really good for their own works.