My tin foil hat tells me that these captcha tests were never about preventing actual bots, but rather they were intentionally put in place for google / whoeverelse to get free training on their image recognition software ai.
This was probably a bonus of using them, but they did stop bots. They aren’t meant to stop the sophisticated AI we have now, they are meant to stop swarms of “dumb” bots from creating spam accounts, ddosing servers, etc
A few bots accessing your site doesn’t matter. A million bots do
Why not both?
I remember when I used Android and Google had the “Google Survey” or something like that. It was supposed to be a way of receiving money for answering pols and studies. In reality I was training Google Maps. The app payed me between 40c and 60c for answering questions like “were you recently at ? When? Give 1 to 5 stars for your experience.”
In the end I bought several apps with that money.
Well as long as its slowing down bots its doing its job, it was never meant to stop bots per se. This is especially the case with the new proof of work captchas coming out lately, which don't even require interaction, it just makes it very computationally expensive for bots.
Since current Captchas do not meet the required security goal of keeping bots away, researchers have called for better and more dynamic approaches to protect websites.
deep arm white rub new loss blood needle knowledge comb interest this knee belief move reward or kind cart work pump cotton short thunder mine box teaching dark nail stomach wrong there left fly hour respect still line snow branch blade science motion potato blade pin far mine poison jewel
new rest will instrument train tin every name condition different cotton you thought silver wet insect drain thick monkey sort learning butter swim suggestion yesterday orange design beautiful map all though weight country stiff wet little among married memory education thumb angry base hope grip list door part may white
iron amount deep pain square value the profit keep weather help fat walk chief belief map blow leaf physical regular record cheese shock spring spring push control comfort support act heat same hope war chain use balance ornament winter muscle give argument parcel book bulb amount meat engine ink page
whistle window physical true talk give key hospital mark wheel tendency kettle thumb fear detail be father potato all key great sharp that go angle decision sense happy hanging horn cry peace school doubt true table foot coat sugar skin day ship fact scissors button verse smile horn opposite farm
distance insect engine quality wall make dear meat attack heat condition scissors law writing thunder soap degree simple wine wine glove good position bath verse beautiful space receipt ball danger order necessary separate gold island wax army apparatus hair from ant chief air dust straight laugh cough chest curtain cry
meal observation blood rule road stamp worm other purpose scale smile waste error silver mist cake invention head waiting match meat name tail dress window jelly sound sand than news tail wax very opinion thought watch camera happy seem flame between colour finger ring west open west idea butter leg
education such judge condition brass air reading kick teaching wound scissors last after sea send sky after boat fact will chain arch growth copper taste market frame when plough yes the daughter design boat watch warm increase news lip where prose wool food wine science unit swim sound regret copper
thick structure wound fowl bee like design white male detail dead soap rate balance minute brown silver under before boy attempt tail paint thin plough bulb produce street this history friend blade rail pen now girl possible support make general sock door record statement cow cow farm knot grey impulse