We were one of the early Crossrider adopters and they've been consistently great and above board in terms of support and improving the product.
The majority of our users (Sales People) have never even heard of installing a browser extension so I'm not terribly surprised to hear about the crazy Google "Crossrider Uninstall" options.
This probably also isn't helped by inconsistent branding between the extension name 'by Crossrider', on Windows the browser helper is called 'crossrider.exe', etc. which the users won't be familiar with as they likely haven't even visited Crossriders site.
One last note as to the 'inflated' numbers for Crossrider, they actually directly serve up and push updates from their servers so they're more connected to the users than just having a download. It might make more sense if they had said: "Supporting 100M users for X Customers" or something.