Even if they don't contribute anything, I'm sure they comply with the license. The software author should've thought twice about the license they use. They will

Even if they don't contribute anything, I'm sure they comply with the license. The software author should've thought twice about the license they use. They will only be thieves if they don't comply with the license. This could be either software authors mistaking non-copyleft for copyleft, or unrealistic expectations about how companies, and capitalism works.