Confused about member webhook triggers

i’m using webhooks to track and perform some backend changes when members are added/updated/deleted.

so far today, i’ve received ~100 webhooks all pointing to member updates. however, when i log in to my ghost dashboard and filter members by last seen today, only 10-15 users have logged in.

how exactly is ghost defining a member update? i’m also fairly positive it’s not people unsubscribing from a newsletter from their mail client, as my newsletter subscription numbers also aren’t aligned with the number of webhooks i’m receiving.

The webhook payload should show what’s changing. Any clues there?