Other people disagree and think that sucesssful sports start make more than is fair.

这个 more than is fair.

是什么用法？ 怎么省略了主语

Quirk et al: A COMPREHENSIVE GRAMMAR OF THE ENGLISH LANGUAGE:

The subject is omitted in the comparative clause below:

You spent more money than was intended to be spent.

The omission suggests that than is functioning like a relative pronoun.

Other people 就是主语、more应该是修饰 make的、整句话的意思就是其他人不同意（前面的观点）并且认为运动会的成功开始比公平做的更多（更重要）

这些只是个人见解、说错了请见谅吖

Quirk et al 解释了末两句的来历：

The girls swam faster than it was expcted that the girls would swim.

The girls swam faster than it was expected that they would swim.

The girls swam faster than it was expected that they would do.

The girls swam faster than it was expected that they would.

The girls swam faster than it was expected they would.

The girls swam faster than was expected.

The girls swam faster than expected.

应该是倒装吧。省了形式主语

Reminding.

Other people 就是主语、more应该是修饰 make的、整句话的意思就是其他人不同意（前面的观点）并且认为运动会的成功开始比公平做的更多（更重要）

这些只是个人见解