Advising people to refrain from committing haraam

Q: Am I sinful if I see a family or friend saying or doing something haraam and I don't denounce it. Ever since I found this out, I have been telling people so politely but now I keep spotting things and because I keep denouncing things, I lost so many friends in the past as they find me annoying and it makes my life miserable. Is denouncing a sin in my heart efficient or am I sinful if I don't say anything?

Benefits from a bank

Q: Is it haraam or sood/interest to receive free Telenor minutes and MBs by keeping more than one thousand rupees in Telenor Easypisa account and doing at least one transaction from the Easypisa app account in a month? Telenor gives 50 net minutes and internet MBs to such customers. 

Reconciling after khula'

Q: I divorced my wife once but I took her back into my marriage. Thereafter she became pregnant. Then she asked me for a separation (khula'). After giving her khula', now we would like to get married again knowing that she is 6 months pregnant. What is the procedure to follow?

Deriving benefit from the bank

Q: One benefit of being a client of a certain bank is that you are able to download an application from the internet called the entertainer. This application is separate from the bank and gives you the ability to purchase items at a discount rate. Being able to download this application is not dependent on any amount that you spend with the bank but is a perk of having a bank account with them.

Note. A person may purchase the application for around R500 per year on their own. If they are clients of the bank they can download the application for free. Please advise if this is permissible to download and use as a client of the bank.