Wow! I did not this! Thank you for your answer Bucky! Has lesswrong done more surveys? Will they be doing more in the future?
The last one appears to be 2016 (this was a slightly wider survey which included other rationalist communities) which was before the lesswrong 2.0 relaunch. I haven’t heard of any plans for surveys—maybe a mod can fill us in.
Slatestarcodex does an annual survey of its readers. Scott pre-registers some investigations and then reports on results. This year, for example, he got a negative result on “Math preference vs Corn eating style” and more interesting results in the ongoing birth-order investigation.