Greed is an amazing thing to me. I'm sure these guys were doing fine. I guess they don't really care about the security of the web - why care when you can profit more by not caring? They didn't really consider that there are many small fish out there who might not have the budget to buy a paid ruleset.
I understand it may be difficult for a lot of admins to move on to a non-free ruleset (Atomicorp or other) or simply use what is currently available from the delayed rules knowing that it will no longer be updated. But your attitude really sucks.
Why in the world is it Atomicorp's job to provide a free service to the community? It isn't, plain and simple -- and it never has been. They've been very gracious. There are some other companies out there who are equally gracious, providing something for free that we really all should be paying for.
I have no idea what Atomicorp's current motivation is, and I have no clue what their original motivation was to provide free rules in the first place. The bottom line is that I'm grateful to them for providing such a comprehensive ruleset. Sure, many of the rules are specific to outdated applications that shouldn't exist on a server in this day and age, but the fact is those outdated applications do still exist in large quantities. I'm quite confident in saying that their rulesets (free or subscription based) have saved the asses of countless admins / companies over the years, including mine I'm sure.
I currently use the subscription-based rules on any servers that I manage for clients. $99 a pop isn't cheap by any stretch, but it's an absolute bargain when one considers the alternative. For each and every mess I didn't have to clean up because the rules blocked something, I've saved more than that in time and sanity.
I'm glad they are going remain in business providing subscription-based rulesets, and I wish them well with whatever plans they have in the future.