The maximum number of 100 registered devices per year in the iOS Provisioning Portal is a tough limit, especially since the introduction of the iPad and iPhone 4. There's a certain number of devices in our group of beta testers that can probably deleted - BUT there's a slight chance, these devices will be needed again.
Now my questions is, will a removed device counted as a new device if it's added again later on?
Bonus question: When will the the limit of 100 devices per year be freed from the removed devices? When renewing the iOS developer agreement or at the end of the calendar year? (To me, it looks like the prior, but both dates are close together in our case, so I can't tell exactly.)
Now my questions is, will a removed device counted as a new device if it's added again later on?
Unfortunately, yes.
Bonus question: When will the the limit of 100 devices per year be freed from the removed devices? When renewing the iOS developer agreement or at the end of the calendar year?
You will be able to register 100 new devices exactly after one year. Even if you renewed your agreement earlier.