The creators of this tool chose to create a company and try to actually make a living off of their idea. I don't see why this should count against them; in fact with the open-source tools of the 2000s now experiencing "license regret" over cloud services product-izing their software (e.g. MongoDB), it probably makes sense to stake out the commercial territory yourself before someone else does.

And the author isn't calling "dibs" at all; her company's product hit the market first, but she isn't claiming any right to that market.