If you call a sledgehammer subtle, then yes it was. There are heaps of reasons why people might give some secrets out.

Case in point. I contribute towards open source software development where I develop and give away a program for free. Why? I like programming and helping people. Technically it costing me to do this since I am not working on paid work to do it. Perhaps other people in this industry may do the same thing. Maybe not.

Who knows accumulating all our little tips and having the ability to analyse the information might collectively put us all in a better position than if we just kept our little secret to ourself.