Runescape circa ~2011. It was a once in a lifetime thing because tens of thousands of players were flocking back to the game because of new updates, and Jagex

Runescape circa ~2011. It was a once in a lifetime thing because tens of thousands of players were flocking back to the game because of new updates, and Jagex (the company behind the game) was selling out for an acquisition by Insight Ventures Partners, so they inflated their player base by vastly scaling back their anti-bot measures (mainly bans). Huge supply, meet huge demand. The Jagex founders (the Gower brothers) came away with $100m for the whole ordeal and power to them the technical achievements of the game (a browser-based MMO written in Java 2001 - present) was nothing short of remarkable [1]. [1]: https://youtu.be/yrVUegwSKlY https://youtu.be/yrVUegwSKlY