Assume we are listing on all 3 sites.
Assume we create our first listing on AZ, and then the other 2.
In doing so, it’s natural that we would upload all of our listing images, to AZ….thus we must do that from Amazon.
Then, after SB imports that AZ item, we can then post it to EB and Etsy…..but, we have to upload all our images again, into SB, because SB didn’t grab them from AZ.
See the extra work?
And, if we’re listing to AZ, as well as at least 1 other site, it’s easier to keep all the listing records tied to the item records, if the AZ listing is created first….since EB and Etsy listings can be created from SB.