Paid exclusivity means that someone pays a company to be the only one who can use a certain thing or get access to a certain service. It's like when you buy all the candies from the store and nobody else can have any because you paid for them all.
For example, let's say you love playing video games. You might really want to play a certain game on your favorite gaming console, but only if you can play it before anyone else. The game company might say, "Okay, if you pay us a lot of money, we'll let you play the game before anyone else." That's paid exclusivity.
Or let's say you're a big soccer fan, and you want to see all the games for your favorite team. The soccer league might say to a TV network, "If you pay us a lot of money, you can be the only one who shows these games on TV. Nobody else can show them, and fans have to watch them on your network." That's paid exclusivity.
It's like having a special toy that nobody else can play with, or a secret password that only you know. When someone pays for exclusivity, they get to have something that nobody else can have or get to.