I have Google Analytics set up and running on all my sites. I have only collected a few weeks of data, but it is already obvious that many of Etsy's stats are useless.
Etsy makes no effort to block referral spam, which is many sessions. Fortunately, GA4 lets us block these domains. I don't think this is retroactive, so the junk that has accumulated is still there.
Etsy doesn't filter sessions that originate outside the US. Since I only sell to the US market, the numbers in the Etsy stats are inflated. I could filter out all the domains outside the US, but that would be a major chore. With some basic math, I have determined that only 11% of the sessions shown by Etsy are potential customers. This is the slow time of year, and I only have enough data to compare the last 30 days.
Goimagine blocks referer spam. This was mentioned in one of the live videos, and I don't see any in GA4. There are no sessions from outside the US, but currently, there is very little traffic from outside the US. Goimagine's analytics are close to what I see in GA4, although I don't have enough data yet to be sure.
Do I start selling outside the US? It would be a lot of work to go to each country and determine the requirements. I was selling worldwide for a while until they started adding all the new rules. I stopped because it was getting complicated.