Attributing an adopted child to the adopted father

Q: My uncle in law adopted my brother at the time of my brother's birth, and my uncle's wife breastfed him. Can my uncle be my brother's real father?

In my brother's nikah, if my uncle in law does not declare that he is the father, but the girl knows who the real father of the boy is, is the nikah correct?

Can my uncle in law write his name as the father of my brother?

Earning through a pyramid scheme

Q: I wanted to earn and bear my university and other expenses on my own so I was looking for online jobs. I came across a business named Forever Living Products. They give earnings by a pyramid scheme in which you have to recommend other people to join your business and become a part of your team and you will get paid. In this way you can earn a great deal of money.

As the growth rate in this business is very high, thus I found it to be a bit doubtful and I think some sort of interest is in involved in this business. Kindly guide me so that I can take my decision accordingly.

How to spend one's Ramadhaan

Q: How exactly should I spend my Ramadhaan? I really want to make a difference in myself and my life, but what should I do that will help with my character so I can improve in Ramadhaan and after Ramadhaan as well? Also, what other ibaadah can I perform besides nafl salaah?