We're currently using Recaptcha Enterprise (score based) on a site. We're consistently seeing low scores (including 0) for legitimate traffic. For requests with low scores, we'd like to present a fallback puzzle. Is there a way to do this using the Recaptcha Enterprise product? 

Recaptcha V2 Invisible seems ideal for us. However, our organization is large and so it's possible we'd have over 100k assessments in a month. Is it possible to use Recaptcha V2 at the Enterprise tier if we are over 100k assessments? I'm a little confused about how the Recaptcha Enterprise product is related to the Enterprise tier. My hope is we can use the Enterprise tier without the Enterprise product if the Enterprise product doesn't support what we need.

Thanks!