They're complicated, so the general rule has been that only accredited investors should participate in them.

PP很复杂,所以一般的原则是,只有可信投资者才能参与其中

耶鲁公开课 - 金融市场课程节选

This is not commonly advertised or described -just like hedge funds are not commonly advertised and described -because it is thought that DPPs are suitable only for wealthy and sophisticated investors.

PP不怎么打广告或者上新闻报道,就像对冲基金一样低调,因为DPP仅仅面向,富人和精明的投资者

耶鲁公开课 - 金融市场课程节选