I avoid them as much as possible -- if someone wants me to train their machine learning algorithm, they can pay me.
newegg lost some of my business recently after thinking it was a good idea to make me fill in a captcha before taking my money.
newegg lost some of my business recently after thinking it was a good idea to make me fill in a captcha before taking my money.
Probably they are combatting fraud, especially the variant "check if the credit card is still valid". There's not much defense against a botnet operator trying out a 100k dataset of stolen CC numbers other than captchas :(
For the interested, this kind of fraud simply orders cheap (on the order of 1-2$) stuff online to check if the card/cvv is valid. Doesn't draw much attention unless one of the victims has transaction notification active or diligently checks their CC bill.