I am firm believer in protecting intellectual property. I own a bunch of it.
But I draw the line at owning a number. A trade secret is keeping the number you use a "secret". They need to do a better job at keeping secrets or use a different technology.
Prime number keys will always be vulnerable to massive parallel attacks. But there are more difficult mathematical transformations that can be used.
And that's my $2.0 x 10E-2.