One reason that an NFT is free is that it can be created for free by anyone. Anyone can mint NFTs, and the technology is so new that anyone can create them. Anyone can make money using NFTs, too, and it will be a huge bonus for the people involved.
Several large companies, like Nike, Adidas, and Walmart, mint NFTs for free. If not, then the best place to find free NFTs is probably OpenSea. But if you’d rather not sign up for the company’s official minting service, there are several other alternatives. Try Mintable and Raible, which are beginner-friendly sites.
In order to earn NFT, you should play games that allow you to collect them. Games like CryptoBlades are a great example. These games involve combat with enemies and earn skill tokens as prizes. You can also generate your own weapons and sell them in the market to earn money.