Isn't the idea of carbonation drops to give you a precisely measured amount of priming sugar in each bottle? Seems if you break one into pieces that you'd be no better than just measuring everything yourself and not paying the premium price for them.
I'm still putting my priming sugar in the pot I bottle from. I like the choice of what I prime with. And there is easily found information on how much of what type priming sugar you need to use to give you a expected amount of carbonation.
I know you didn't ask for my 2¢. But you got it anyhow.