What I imagine happened is some programmers at a now defunct company wanted to get their names on a patent because it's cool. They come up with the most generic algorithm ever, easily get it patented, and then they get to brag to their drinking buddies.
Then, the company they work for goes out of business/gets bought and the patent is transferred to a patent troll like this Bedrock company who then try to find where it 'infringes'.
That's all my imagination, but similar things have happened.
What I just learned with this article is the Bedrock company is no longer active...how can you win a case when you're not even an active company anymore!?
Note: I don't have a tremendous amount of sympathy for any large company like Google, Oracle, Apple, Amazon, etc. who get sued for silly patent 'infringements' because they would do the same in a heartbeat. ALL software patents should be abolished.