Yes, they are. Here's my (shameless plug) rather simple explanation of how it works. The long and short of it though, is that only half of any given reCAPTCHA

Yes, they are. Here's my (shameless plug) rather simple explanation of how it works. The long and short of it though, is that only half of any given reCAPTCHA is known, and you can usually bypass it somewhat persistently by just guessing that half. Also interesting that I attributed its function as "contributing to the common good", while I infer the intent of this post as suspicious of nefarious motives. I suppose either stance makes sense with the appropriate amount of skepticism. https://medium.com/tech-talk/e8f2a748f95f https://medium.com/tech-talk/e8f2a748f95f