Why do some retailers allow bots and scalpers to purchase high-demand items, and what can be done to prevent this?

Some retailers may inadvertently tolerate bots and scalpers purchasing high-demand items because it can still result in quick sales and revenue for them. Additionally, they may not have robust systems in place to detect and prevent such activities. To prevent this, retailers can implement measures such as CAPTCHA tests during the checkout process, setting purchase limits per customer, using bot detection software, requiring user accounts for purchases, and monitoring and blocking suspicious IP addresses.