Yeps, there is no guarantee on that business.
However, business owners must have risk management. As long as businesses have strong purpose, they will survive. And they will get sponsorship or investor for their business

Just an example, freebitco.in... this is the oldest faucet web that I ever saw and played, but this platform still exists till nowadays.
I think, "freebitco.in" is aimed for bitcoin-newbie as the user.

So, what your target and purposes for your platform? Money, visitors or loyal user?