Okay. I just tested this and it all went fine! :)
I first had to create a page in your site with the s2Member shortcode for the ClickBank button, published it, logged out of the admin account, went to that page and clicked the button. Went through the checkout and was taken to the custom thank-you page at /gracias-bienvenido-al-equipo/ without errors. Then I went to register the account and logged in to the new account and had access to the content.
I also properly received both, the Signup Confirmation and New User emails. You may want to customize the emails, though, particularly the Signup Confirmation one, since it went to the Spam folder. Make it more unique so it’s not picked up by the spam filters.
You may want to do some test purchases yourself too.