这个青少年足球联赛实行付费参与制，让许多家庭负担不起。

The youth soccer league operates on a ___pay-for-play basis, making it unaffordable for many families.

这个音乐应用采用了付费点播模式，热门歌曲需要单独购买才能收听。

This music app adopted a ___pay-for-play model where popular songs require individual purchase to listen.

这所大学被指控在橄榄球项目中存在有偿参赛的违规行为。

The university was accused of violating rules with its ___pay-for-play scheme in the football program.