Google hates Survey.io - 32% drop in SE traffic
blog.styleguidance.com
blog.styleguidance.com
The numbers here are too small and the data too limited to make that claim. Also search engine changes aren't instantaneous -- I've seen it takes days or weeks for changes found in a crawl of a small site to percolate through Google. Did Google even crawl the pages in question on the day Survey IO went live?
A lot of times, it takes like 7 minutes from the moment a question is posted, to the moment it shows in Google.
But yeah I'm just as baffled as you, as to why it had such a big impact
Just rolled back that inclusion... we'll see if that was the reason for the traffic drop.
Edit: quick clarification... the survey.io code was the only change that would be showing up to spiders. The other updates included in the change were all within areas that require authentication