Yep. I've done this. I explained to the CSR when asked why I wanted to cancel that it was because I found the website's captcha unnecessary and too hard to us

Yep. I've done this. I explained to the CSR when asked why I wanted to cancel that it was because I found the website's captcha unnecessary and too hard to use. I'm sure they didn't care, or just thought I was tilting at windmills, but if I'm one of many that cancel for that reason, the service might understand it's costing them money.