Last weekend's Pokémon Go Fest saw a massive spike in user spending, with $17.5 million spent across the two-day event.
Sensor Tower estimates show players spent $8.9 million on Saturday, July 25 and $8.6 million on Sunday, July 25.
By comparison, revenues for Friday, July 24 reached $7.8 million.
The $8.9 million generated on the first day of the event makes it the most lucrative single day for player spending in the game since July 29, 2016, when players spent $13.3 million.
Since the start of the year, Pokémon Go has generated $539 million, bringing its lifetime revenue to almost $3.7 billion across the last four years.
Developer Niantic made significant changes to the game earlier this year to account for the COVID-19 pandemic. While the game centres around players going out into the real world and interacting with different locations, the studio made it easier for players to progress while staying at home.
This has an immediate effect, with revenues spiking just a week later.