I see it as putting your software on a payment plan. I use it for Photoshop ($625), Lightroom ($123), Encore/Premiere ($800), Audition ($350), Acrobat ($400). Total RETAIL Cost - $2298. Divide by $30/month = 76 months. Granted there is lots there I wouldn't pay that kind of money for (Premiere and Audition) but since I've got it, I use it. I am only a hobbyist, but to me it's easier to justify the $20 a month (for photoshop cloud alone) than the $800 flat. Especially since I can say in 2 months - "Holy crap! What have I gotten myself into with this gargantuan piece of software that is Adobe Photoshop!?!?! I'll never be able to figure this out. I guess I'm out $40 after using it for 2 months." Better than being out $600 for software I never use.
In the interest of full disclosure, I'm married to a teacher, so we get the education discount and pay only $20 a month for the full subscription with no contract. I don't think I'd pay $50/month for the full cloud, but I would pay $20/month for photoshop. For anyone else who would like to take advantage of the same deal. Enroll in one class at your local community college for $40 and you too can take advantage of this amazing offer!