This is the most common model. The generator is "free" because the owner displays intrusive ads, pop-ups, and crypto miners on their site. Every time you generate a link, they earn ad revenue.
While technically different from a standard PLG, this is the most robust solution. Services like Real-Debrid, AllDebrid, or LinkSnappy sell a subscription that grants access to premium downloads from dozens of hosts (including Hotlink) for a single price. hotlink premium link generator free
If you absolutely need a free hotlink solution, avoid random Google search results. Instead, consider these safer, semi-automatic methods. This is the most common model