Well, most of the designers (not only on CGTrader) sell their digital assets under the terms of the standard Royalty-free license and as you can see, there are no scandals that someone bought models, opened a company and got rich for millions of dollars. Throw away fears and doubts and just sell. With the right approach, it can become at least a good hobby, and maybe a good business, it all depends on you.
As for 1%, take a closer look at the terms of the royalty-free license.