Comment by luckylion

There was no hard block, just everyone getting the brief JS-captcha-thing.

The reason I'm fairly confident that it wasn't bots that were blocked is that we run quite a bit of bot-filtering in our analysis (and only track via delayed JS, which already gets rid of of 80-90% of bots; we don't care about bots viewing our pages, but we don't want them to mess up our stats) and all other metrics (conversion-rate, device + browser-distribution, country-mix) still lined up, they were just significantly lower than what expectations + search analytics said they should be.