You earn free Ethereum by spinning a wheel of fortune wheel. The number of spins that you can have is determined by the “energy” that you have in reserve. Energy regenerates itself slowly, or you can watch videos to top up your energy faster. You need to accumulate 10,000 Gwei before you can withdraw your winnings. But, that doesn’t take as long to do as you have thought.
or Let's say more Startup project we have for now 5 project they are reall project each project give you good return everyday so of you invest for example :If you invest 10 USD in Ether we will keep 5 USD in our bank and we give the rest money 5 to the (company or the leader of the project )then he work daily . if something going wrong like these project is scam or stop we will ba k to you only 4USD so in these case you did not lose all your money but you lose some part.