UA strings, just like any other client information forwarded to the server (see: android/iOS data accessible by JS & the server) only exists to build a profile to better filter who you want to serve ads to. It's always ads. Anything else is an excuse, period.
That's what'll trigger the CF captcha as well: if you don't give up client data. Run a site on Chrome bundled with your Anroid? Never going to get captcha, since Google will gladly serve any of your data when it's asked.
That's what'll trigger the CF captcha as well: if you don't give up client data. Run a site on Chrome bundled with your Anroid? Never going to get captcha, since Google will gladly serve any of your data when it's asked.