As a part of its supposed anti-bot measures, Best Buy allowed only users with a US$199 Totaltech subscription a chance at buying Nvidia RTX 3000 series graphics cards. However, there wasn't a limit on the number of purchases per account, which effectively allowed scalpers/bots to walk away with a good chunk of the GPUs.
https://www.notebookcheck.net/Best-Buy-wants-you-to-get-a-US-199-Totaltech-subscription-for-a-chance-to-buy-Nvidia-GeForce-RTX-3000-series-graphics-cards.598838.0.html