Former core Grin developer Gary Yu mined $118 worth of GRIN cryptocurrency in less than 24 hours with a Grin ASIC mining device.
Source: https://cointelegraph.com/news/grin-price-up-over-11-as-former-developer-tests-asic-miner
Grin Price Up Over 11% as Former Developer Tests ASIC Miner
August 11, 2020
CoinTelegraph