If you say that there is money in something, you mean that the activity will produce a profit.

There's money in sport these days. 目前体育市场有利可图。

If you help us, there's money in it for you. 如果你帮助我们，你可以从中获利。

There's a lot of money in football, as you know.

There's so much money in the game today.

There's money in these industries, whatever you think of them.

Companies will continue to make these products because there's money in it.