Something has gone wrong if a customer ever sees this page.
TLDR: if Memberstack doesn't load, we should be the one's responsible for fixing it. By sending people to our website we'll have an opportunity to help them. For example, we could recommend they upgrade their browser, contact support, try again but more slowly (if they have bad internet), etc.
Because we know what domain they are coming from we could dynamically populate tutorials (if it's a testing domain), contact info (if it's a production site), or automatically redirect them to the appropriate next step.
We'll get tons of analytics about who is having troubles (browsers, devices, locations, customers, etc). Should help with conversions and customer retention.
Plus it's great for SEO!
Lastly, if we ever have hosted pages we could dynamically send people to the hosted page.