From the infamous AMA: We’ll continue to be profit-driven until profits arrive. Unlike some of the 3P apps, we are not profitable.

To me it sounds that he is envious that 3rd party apps were profitable and Reddit isn’t.

[Google got] into open source software and it seems those survived the experience

Not really. Google is responsible for the open source browser Chromium, which is the base for Google Chrome, Edge, Brave, Opera, Vivaldi, etc. They dominate the browser market, and they use their position to implement features outside the web standard. Their competitors (mainly Firefox) are not able to implement the non-standard features, driving them out of the market. Classic Embrace-Extend-Extinguish.

Google got into the Linux space

Technically, both Android and Chromebok are Linux-based. But Google has done everything possible so that they aren’t part of the “Linux space”, to the point that Android uses a fork of version 3.x of the Linux kernel (regular Linux is now at version 6.x).

But they won’t be capturing new users from the Fediverse, they will capture them from Facebook and Instagram, and since this is mainly a Twitter competitor, also from Twitter.