A) Do you actually think this model will hinder hackers? If so, you are mistaken. I'm not saying that I agree with this, but there are already numerous threads and posts where people are outraged of having to pay monthly to 'rent' Photoshop and have outright said that they plan to pirate it. There are already a number of pseudo methods of how to hack the software - it's simply a matter of time (unless it's been done already, but I'm not out searching for it).
Yes, as a matter of fact I do believe it will hinder hackers. Why? Because now they can force updates as often as they like. They will have the ability to make the pirating venture not worth the time and effort. Yes, people will try... some people may succeed (only briefly)... but in the end this is a good move for adobe and creative professionals. Sucks for people who don't like spending money... but that's the nature of the beast.
Actually, yes, I've used gimp tutorials before. A lot of photoshop tutorials also translate in concept. If you're willing to pay professional prices for professional software, seems like your options are limited.
The actual cost difference is not that great, and when you consider all the benefits of the new model to actual professionals... seems like a no brainer to me.
To each their own....

