It's too good to be true that Cakewalk is free. The fact that Cakewalk isn't open source leads me to believe that Bandlab must be hiding something.
What would be lost if it were open source? Instead of a negative, Bandlab would probably get attention and support, especially from those in the Linux community.
It is also strange to note that according to their privacy policy, they "will not rent or sell your Information to Third Parties without your consent". The ability to revoke this consent is not in the settings. Instead, you have to email them.