Does the sync count include times you have sync’d the design to your own watch? Also, does it count multiple times if someone else syncs your design on multiple occasions?
Yes. It counts every sync.
I think it doesn’t count your own syncs… but I´m not shure. Multiple syncs from the same user, yes it counts.
That’s correct - syncs from the author of the watch face do not increment the sync count (or if they do, that’s a bug). Repeated syncs count as a syncs today, but that may not stay the case longer term.