I see an ad that says "get a coupon for X amount our product - click here". Follow the link and you are required to 'like' the company on Facebook in order to get the coupon. This is blackmail to increase 'like' for the company!
BTW: where is the 'unlike'? or even better a 'dislike' the whole mess!
Facebook is never going to put a dislike button on their website. If it existed then they would make no money from ads because everyone would dislike them being shown.
As for having to like the company to get the coupon, there are no free lunches.
That's their promo. Why would they give you the coupon for free?
Also, you can close the ad and select if it's misleading, offensive, etc. I think that's what you're looking for
I dont know why you're affected by it but this is the way of the marketing strategies these days. You should try yourself and it works. Not everything in this world you can get free, you simply just to like them and get your reward. Then unlike later on after you have your reward.