[andrewjshults]

A bit further down the page, they cite Zapier

"Over a representative time period, Zapier polled for changes 30 million times but only took action on 460,000 of those polls (1.5% efficient)."

[bdcravens]

It's a Zapier project, so they're citing themselves.

https://github.com/zapier/resthooks

[Hovertruck]

Ah, I must've missed that. Thanks!