Altman wanting to look idealistic and inspiring.

See it as a brand image advertising campaign of the time.

The ideal is "It would be ideal if everyone on the planet voluntarily paid me $20/month"

Most billionaires are idealists when it comes to this one particular ideal.

The opposite of an idealist is a materialist. The opposite of an ideologue is a pragmatist.

In this sense I think Altman is an idealist, he concerns himself primarily with ideas, not so much with material reality.