Like all big companies, when something comes along that is growing fast, where they don't have a product, they might choose to buy an existing one to get in the market. On some of them they might spend lots of time and money building huge amounts of new technology and improving on some of them so they were hardly comparable to the original. SQL Server is one example I worked on. The original sybase product had a pretty nice sql language with stored procedures, but the implementation didn't take us very far. It was basically awful. We spent years building out a new database with that same sybase surface layer, we added lots of new things over time - new execution system, new query optimizer, integrated it with .net, etc. Because we didn't have to develop a new surface or sql language, it helped a lot. I always wondered how much that cost Microsoft to buy it. I'd say even at 100 million it was worth it.
Only going to recess on Fridays, if you have been good all week, that's kind of stupid and unbelievable. It's not the experience of having kids in the last 20 years, at least in the US.