Source
When this applies
when an incumbent controls the distribution channel that a challenger depends on for growth
The takeaway
If you control distribution, you can neutralize a threat by making its functionality free and ubiquitous through your own channel, independent of product quality.
Why it works
By bundling a free, 'good enough' competing product into the dominant distribution channel, the incumbent destroys the challenger's monetization model (which depended on being the default) without needing to out-innovate it.
One level up
Whoever controls the distribution channel controls the economics of whatever flows through it.
Where it stops holding
This stops working when the distribution channel is not actually a monopoly, when regulators intervene, or when the competitor has a business model not dependent on being the default (e.g., has its own direct distribution).
Detail
situation: Netscape IPO'd at $3B and reached 70% browser share; Mark Andreessen publicly said Netscape would reduce Windows to 'a poorly debugged set of device drivers,' threatening Microsoft's platform control.
decision: Microsoft made Internet Explorer free and bundled it into every copy of Windows starting December 1995, then extended deals to AOL, CompuServe, and Prodigy to drop their own browsers.
outcome: Netscape's stock dropped a third in a day and never recovered; IE went from 0% to ~100% market share by 2000 while Netscape's server-software business model (which depended on browser share) collapsed, and the company was later acquired by AOL.
lesson: If your distribution decides to compete with you and prioritizes it, your business dies almost instantly — control of distribution trumps even dominant product-market fit.
In their words
And on that day, Netscape stock drops by about a third and never recovers. That was the high watermark for Netscape. It's over after that. Yep. And for good reason. I mean, there's a very difficult to learn lesson, but you learn it once. You never forget it. If your distribution decides to compete with you and decides to make that a priority, your business is over in a minute.