Large CAD vendors are experiencing declining revenues during this economic lull; for some of them, the bulk of revenues comes from annual subscription payments -- and so the software vendors are touchy about losing subs. Customers aren't really keen on paying hundreds of dollars for questionable benefits, especially for CAD seats formerly filled by now-fired employees.
For Autodesk, the hammer is the solution: 'stop making payments on our software, and we'll charge you a 50% penalty when you come whimpering back to us.'
For SolidWorks, the solution is the carrot: 'we'll extend your subscription by 12 months.'
Maybe after this recession, CAD vendors will mimic Microsoft (again) and begin to impose multi-year subscriptions. As with Microsoft, this would get them off the hook of delivering upgrades every year, as well as create a bridge effect over short-lived recessions.