With most of the ship now buying a "package" lately, they don't have much say about the gratuities anyway. Unless you have a real complaint about something that's gone wrong during the cruise, your sort of stuck.
We'll buy their package sometimes, and sometimes not depending on how I feel.
For our money it's just a waste as the internet isn't something I need and 15 drinks a day is way over my limit at my age.
The real question is, what to do with all that OBC if I don't use it for gratuities?
Casino, perhaps?