The web-based generators are notorious for "verify you are human" pages. These aren't Google's reCAPTCHA. Instead, they ask for your phone number, email, or credit card details to "prove your age." Within hours, your information is sold on dark web marketplaces.
Software "generators" (gen) have existed since the MSN Messenger and LimeWire days. They claim to exploit a mathematical loophole or a SQL injection vulnerability in the Xtream UI panel to generate random, active usernames and passwords. xtream code generator hot