> But then again if you've found cases where you can build a business off of serving users 10 fewer mb of JS than a competitor, more power to you. Be the change

> But then again if you've found cases where you can build a business off of serving users 10 fewer mb of JS than a competitor, more power to you. Be the change. That depends upon the product. If the primary revenue engine is advertising the product is the end user, not the software. As such, track the shit out of them. If the revenue engine is something else or the goal is merely disruption then, more than likely, the product is the application. The primary driver empowering retention is don't give your users a compelling reason to consider the competition.