Using Smart Shopper points

Q:

1. Is loyalty points and the money attained by means of this permissible? Example: Smart Shopper points.

2. Also, if a person works for a company who reimburses him for his travel, will it be permissible to fill up at a garage which gives him points for his petrol.

Paying zakaat in kind in place of cash

Q: My question is regarding zakaat. I work in a retail clothing company and my boss tends to miss zakaat payments due to cash flow reasons. Alhamdulillah his business is good and intentions are clear. Due to the nature of his business, he needs to hold lots of physical stock of clothes. Someone advised him that he can pay clothes as zakaat if he has cash flow issues. My questions are:

1. Can he pay his zakaat in clothes instead of cash?

2. If yes, can he clear off his OLD STOCK, and at what value - the value at the time of production, the value at the time of purchase or the sales value?

Killing monkeys who have become violent

Q: Monkeys are becoming a big problem in our area, where they are even attacking children and adults if they think the person has any food on them. They are not scared when chasing away is attempted.

Is it permissible to shoot and kill them, if this problem is persisting?

Although it is a big problem, as the troop sizes keep increasing, authorities dont acknowledge any problem.