Found this on CDAN of all places.
This A list gaming company which is a merger of two big companies has a patent in which their match making services (traditionally random based on certain parameters) can be rigged in order to influence in game purchases. If one reads between the lines, this implies that all random events in their games are determined server side.
The ramifications of said patent were present for all to see at the online collectible card game world championship in 2019. In said tournament, the company fully rigged random results left and right in order to obtain political favor with China. This incident occurred within a few weeks after the company banned multiple players for speaking out against Chinese oppression of Hong Kong.
Examples of rigged events on behalf of the Chinese player included always having certain key cards in her hand by X turn, always going second when playing a deck that greatly benefits from going second, or random results from cards played always swinging significantly in her favor.
Many people who watched the live stream of the event suspected the fix was in, but had no proof. It is unknown if the player herself was in on it (assuming no due to innocent until proven guilty).
This is potentially the worst scandal in esports history.
US Patent Publication No.: US20180065047A1
Owned by Activision Publishing Inc.
Title: System and method for driving microtransactions in multiplayer video games
