Why the same person visiting twice does not pay twice

If reloading a page paid every time, the number attached to your account would stop meaning anything. Advertisers pay for people who might be interested in what they are selling, not for the same browser refreshing in a loop.

So repeat visits from the same address within a set window are recorded but not paid. You still see the visit in your statistics, which is useful, but it does not add to your balance.

This is not a restriction aimed at you. It is what makes the rates sustainable, because a network that pays out on inflated numbers either lowers its rates or stops paying altogether.

The practical takeaway is that reach matters more than repetition. Ten people opening a link once is worth more than one person opening it ten times, in every sense that counts.