I totally understand, I've been spoiled by working with web designers that are very customer service oriented and who have not held their customers hostage...so this has been very disheartening on several levels.
All three of the clients have been referred to other web designers per my recommendation. One has moved, one is waiting for a little while, and the other has not decided yet.
I have managed to do some canonical meta work using the plug-in and appreciate your sharing the other options available.