Yes. Leonardo.Ai allows you to use the website for both personal and commercial purposes, however, the content generated by users is subject to and governed by Section 3 in their Terms of Service.
Free users of Leonardo.ai can use the images they create for commercial purposes. Leonardo.ai grants free-tier users a non-exclusive, royalty-free license to use their generated content for commercial purposes worldwide. However, Leonardo.ai owns the rights to the images.