YSK: If you receive a packet from the Nielsen Family, it’s not junk mail. Often times there’s 2-5 dollars of cash in the envelope. You can earn more by sending in logs of what TV shows you watch.
from /r/YouShouldKnow
YSK：如果你收到来自尼尔森家族的包裹，这不是垃圾邮件。很多时候，信封里有2-5美元的现金。你可以通过寄来你所看的电视节目的记录来赚取更多的钱。