How to prevent the free distribution of your paid downloadable products?

Hey everyone,

I'm reaching an exciting new stage with my platform Frontend Mentor. I'm now in a position where I've validated the core idea behind the platform and can start testing ideas to make it profitable.

Having spoken to many of the people who use the platform, one key insight has been that they would like real show-stopper portfolio pieces to help them in their job hunt.

So I'm planning to start releasing premium challenges alongside the free challenges that the platform offers.

My main question is: how do you prevent (or at least reduce the risk of) people either intentionally or accidentally sharing paid downloads if they're essentially just digital downloads?

One way I plan on doing this is to build so much value into the platform that people will want to buy the challenges there to learn more and get a better experience. But that will take time.

In the early days, people will be simply downloading the files required to build the premium challenges (Sketch design, assets, written content, design system, etc) and then uploading their solution to the platform. It would be very easy for people to share these around and even accidentally upload the Sketch file to GitHub when they submit their solution.

Does anyone here have experience with selling digital downloads successfully? I could well be over-thinking it.

Any advice or thoughts would be welcome.

Thanks!