How about letting Stackers choose to display either the number of Stackers or the zaps?
I think allowing the number of Stackers as an option can shift us away from the prevailing mindset that zaps are the only/main criterion of a quality post.
We can do a A-B version for a week or two, the same way Google does: Google rely upon A-B testing. They release two versions of the software at the same time and receive quick feedback on what approach is more successful. I don’t mind volunteering to have just the number of Stackers displayed on my posts; I suspect it might mean more to me.