As far as I know, none of the software players (atleast Power DVD and TMT which I have) use the subscription model. These are always version based. The update/upgrade policies are mentioned clearly - updates free till next version, upgrade to next version payable.
The problem with the software players is that the older version will cease to play recently released BDs without the update and one will be forced to upgrade to the newer version. The vendors know this and that is why they dole out the older versions ( and never the newest version) free with the optical drives.
Most decryption software is of course subscription-based but they keep their word on lifetime subscription - atleast it has been so till now in my experience.
(Starting from DVDFab Decryptor v5, I have been getting regular updates/upgrade to version 6, 7, and 8. Now v9 has come up but that involves only a facelift to the GUI. The basic modules remain the same and I continue to get updates to version 8. People have also been getting regular updates to anyDVD/anyDvDHD for more than 7 years now.)
EDIT: Just now I read in DVDFab Forum that registered users of DVDFab8, can upgrade to DVDFab9 without further charge. There was a little confusion on it till now.