Paid to click sites help certain advertisers to promote their products and services to targeted customers by paying for ad views. Advertisers will focus on leads and sales through advertising i.e. they spend money to sell their products or generate leads for their services. And remember that you will get paid to read ads whether or not you make any actions(sale & Opt-in).
There are legitimate concerns about security on Ethereum. With such a complex system, and so many different programs running on it, the attack surface is large. And given the challenges the community faces in migrating to Ethereum 2.0, including a new proof-of-stake consensus mechanism and a sharding solution for scaling transactions, it’s still not assured it will ever be ready for prime time.
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.