Ask HN: Does Zoom Webinar inflate registration page visits?

Your highly specific question of the day. And about marketing, to boot.

I'm running a Zoom webinar for a client and noticed the # of signups is abysmal across multiple marketing sources, according to Zoom's stats. But then, looking into each source's internal analytics, none of their traffic stats align with Zoom's.

Page Visits / Registrations, per Zoom: Source 1: 95/2; Source 2: 142/1; Source 3: 41/1

Page Visits / Registrations, per each source's analytics: Source 1: 3/2; Source 2: 54/1; Source 3: 1/1

Anyone else experience these kinds of discrepancies?