s2Member and Working Google Analytics Tracking?

Any Google Analytics query is usually stock answered by pointing here:

Which apparently worked in 2015.

Does anyone have a working example for the current GA that shows signups/modifications in GA > Conversions > Ecommerce or anywhere in GA?

I’m guessing popup blockers baked into every browser and installed by users have basically made the old way untrackable for many years.

Have a better way with API Notifications? Links or examples, please.