Must have been the wind ... https://www.youtube.com/watch?v=fuuZhASsP_M

WinRAR is one of the most iconic pieces of software out there, not because it’s useful or instrumental but because of its famous 40-day trial period that never expires. This isn’t some glitch or bad programming either, WinRAR is well aware of this bypass and it’s very much instrumental. You see, WinRAR doesn’t make its money from daily users; they make its money from businesses. And the easiest way to get businesses to use WinRAR is to get the public on their side which is exactly what they’ve done by making it essentially free for everyday people. While companies could easily just pirate WinRAR, it’s usually not worth the consequences due to the reputational damage that would follow if this leaked. As a result, large companies don’t think twice about paying for WinRAR especially given how cheap it is. And given that WinRAR still pulls in $21 million per year despite its popularity falling off a cliff over the past decade, it’s clear that this strategy was still rather lucrative. Nowadays, some of the biggest companies in the world leverage a similar design such as Google, Facebook, Instagram, and Snapchat. This video explains the rise and business model of WinRAR and why WinRAR’s 40-day trial period lasts forever. ... https://www.youtube.com/watch?v=R-ryorDKYG4