I've kept a close ear to all the problems regarding "free-to-play" models like Candy Crush for the past few years, especially since it has begun to heavily affect premium console game development. I've always seen it as worse than gambling as these companies are making a bulk of their profits from children who use their parents' credit cards.
Yes it is unethical to sell what is pretty much like gambling to kids. I think we have all heard those horror stories on the news where a parent receives a huge bill for something they didn't buy.
Great article, would love to see more in the future! Followed
Thanks:)