No, that's not currently possible. The activation date doesn't necessarily reflect the last time TurboActivate contacted the server.
So you can store the last used date locally, or ping a script on your website.
Is it possible to see on the website when a certain activated application was last used by the user? This would basically be the last date that the license was verified.
It might be possible to do that through the "extra data" field. Can one write to that during a license check, or only during activation?
No, that's not currently possible. The activation date doesn't necessarily reflect the last time TurboActivate contacted the server.
So you can store the last used date locally, or ping a script on your website.