When I first started as a Turker back in April 2018, I had no problem getting and working HITS, yet over the past 3 or so months, I would guess about 25% of my HITS now require me to check off that I am a “human” or use CAPTCHA or have some form of puzzle type check to ensure that I am a human and not a bot completing a survey. Yet I was just wondering, is there now an epidemic problem with Amazon Turkers using a form of bot system to complete HITS? I have now done over a 1,000 HITS, yet with as many attention checks that I have found with a good percentage of my HITS, I can not image that someone has come up with a bot to do these various random type HITS, with the chance of the bot not being able to get pass the attention check(s) and the strong chance to the HIT being rejected. Yet I would guess that these bots seldom make mistakes and can out smart the attention check(s), so that the HITS that the bots complete do not make enough mistakes to get enough rejections to close/suspend an account with too many rejections. In my case, I take my HITS seriously, and strive to never get a rejection. “To me”, NOT getting a rejection is more important than whatever the HIT pays "To me", working a HIT is kinda like a game for me, where working the HIT and NOT getting a rejection is the fun that comes from working HITS and getting paid in the process for not getting a rejection.