First time I heard of this company. Their website is in the highest order of marketing speak, but actually offering nothing much. Note to self: security services are a nice way to milk governments & corporations.
In any case, I'm glad that Nginx is still available for free and the project will continue to have funding in the future from what looks like a cashed-up company. Besides, if it doesn't work out, it can always be foked. Hooray for open source software!