>Chrome is the same thing. Why would a for-profit company develop a web browser more or less unprompted and give it away for free? To draw people into the system and get them comfortable with staying there.
I think you're giving them too much credit, bordering on a conspiracy theory. There's no way they knew all of this would happen and that they would now be in the position to dictate the plug-ins we use.
I'm not saying they didn't want that and they are not happy to be in this position.
What I'm saying is that their initial plan with Gmail/maps/chrome was to gather more data and give themselves the competitive advantage in the ad selling business. If you remember, when most of these products started they looked nothing like each other, quite telling that there was no central plan to create an ecosystem.
The ecosystem idea started much later, with the failed attempts to make social network and with the not-so-failed Google Now which is when they finally started bringing all the data they had together.
Surely they took advantage of their position eventually and managed both to create an ecosystem and to successfully lock people in, but that doesn't mean that they planned it since 2003.