Diamonds should have a use.
There should be a shop or something where you can spend diamonds on things like blocking ads, customizing your profile, or making it more likely to show your upload on the home page. There could also be an option to buy diamonds, like 1000 for a dollar or something.
Those are just my ideas of things diamonds could be used for and there's probably a lot more things you could think of to use them for.
What about the more diamonds you get, the more money you get will be mailed to you!
...You buy it from diamonds...
I agree too. But, also, there should be like admin stuff for the app, and Minecraft.