What was the rate of bot questions and answers before the current measures?

None at all. The most recent spam was the random cvnsdxcv answer spam which was a few months ago. That stopped on its own. Before that was all the chinese crap and then they added those awful filters which have ended up doing nothing but filtering out legitimate answers. So not only do we not need those filters anymore but now they decided to add captchas for no reason at all. Many users have already been driven away and only more will leave. Nobody is going to contribute to a site, on their free time, when they are constantly getting harassed with this crap. I can't even figure out when it happens. Sometimes I can post 20+ answers without a single one and other times like right now I've gotten one each time on my past six answers. If they don't remove this I am out of here. Not like Quora is already 10000000x better than this.

Also the captchas on this site are horrible. On my four most recent answers I had to redo them at least three times each even though I did exactly as it said. I commonly do captchas on other sites and I have to redo them maybe like one time for every 50. Starting to think verizon got paid off to put in googles neural network overlord turing test to farm free labor

Well, some repeat-offenders seem to have disappeared since the captchas are here