Ever considered priority sync for supporters? It is actually not because it takes long - i am just so damned impatient, when i’ve been out hunting nodes.
It’s already s part of the supporter benefits.
Your Garmin activities should come through quickly as a supporter.
What kind of delay are you seeing between saving in Garmin and seeing it in CityStrides?
Also, what kind of delay are you seeing between it arriving in CityStrides and it being fully processed?
I use run keeper and am a supporter and it usually takes about 15 minutes to sync - meaning my run will show up with completed streets but sometimes it takes a lot longer (hours) for my map to update.