Why do the PC's still bother existing?
There was never a merger or disbandment vote. The vast majority of Tory politicians and supporters just left to join the Saskatchewan Party. This left the PC party:
1) With substantial assets, but no membership
2) In the hands of a few anti unite the right types.
If a party is deregistered in Saskatchewan, all the assets are forfeit to the provincial government, so the guys in charge of the PC Party run a few paper candidates each election to keep the party registered until... they return in glory?