The sign-up window is limited; the price is not.
- Everyone (regardless of whether you own previous Adobe apps) can sign up by next Monday (Dec. 2) to get Photoshop CC & Lightroom 5 the $9.99/month price.
- Anyone who owns Photoshop CS3 or higher can sign up by Dec. 31.
- The price itself isn’t limited. That is, it won’t be going up in a year. (Adobe has no plans to raise the price at all, but we can’t say that it’ll never go up—e.g. for inflation—or down.)