It is not possible to check estimated revenue of another site, yes but you can check their marketing strategy and monthly traffics by Semrush , Moz , etc with the help of marketing strategy you can take an idea about their revenue and conversions. More on reddit.com

The free Shopify cookie banner works for starters, but it would be hard to check if you actually comply with GDPR with just that. I would recommend utilizing a cookie banner app from the Shopify App Store that can check for the cookies used on the storefront to ensure all of them are part of the cookie banner consent. Lots of our clients use Consentmo GDPR Compliance for these additional features. The only thing to note is that if the plan maxes out, the banner stops working, so it is important to check the app regularly to upgrade the plan once it's maxed out. More on reddit.com

There's a difference in what they call a "visitor". GA is counting crawlers, bots, etc. as "visitors". Shopify is counting actual time on site. You can drill down into the GA numbers to start seeing the difference. https://help.shopify.com/en/manual/reports-and-analytics/discrepancies More on reddit.com

u/mousepadroof You can try Report Pundit app to generate a report by Sales channel and sales tags. You can use filter to exclude wholesale orders. There is a pre-made report which will do the job for you. You will also get experts help in creating custom reports instantly. You will have 14 days of free trial. Here is the link for the app https://apps.shopify.com/report-pundit More on reddit.com