The toys were probably some kind of motivation back then, I mean, which kid don't want bright toys, and I doubt they all have the economic common sense, knowing how much said toys are really worth. But, pricey or not, the toy will still be his/hers, good reason enough to want it. Now does it really help sell the meals, if there isn't that many choices of restaurants in the region, maybe, less choices plus a bonus. Is the law crazy, not that much, I've seen so much stupid laws getting voted lately, the only motivation the government really have is, he needs to get elected again, these laws makes them look involved in the health, security, good of people.
Here's another recent law that got accepted where I'm from, If you have your driver's license for less then 3 years, or are not aged 21 or older, you cannot drive from midnight to 5 am. Meaning, you can't drive when traffic is low, or if you have 2 years more experience then someone who just began to drive at 23..It is a strange world we live in