Playing on behalf of others is to collect money to help people get points or grades. Half a generation can have many explanations.

One:

Help people number for free or at a very low price.

Two:

Not often, just occasionally.

Three:

Insufficient strength, you can only play some low segments, but you can't play higher ones.

Four: I don't make orders myself, but I deal with a group of people who do or look for a foundry.

Five: I can't think of it ~ ~ ~ ~