One of the best flash events in Monopoly GO is Sticker Boom, which increases the number of stickers you get from a pack. Depending on the pack, you can earn up to four extra stickers.
Based on historical data, you can expect one Sticker Boom every seven to 10 days, mostly on weekdays. This counts only Sticker Booms as flash events. Those that come as rewards from Partner Events happen about once every 25 days instead and may or may not affect the flash events schedule.
