I basically agree with you, but there is a difference too. When you buy a laptop you're not strictly dictating how the money is used, but you are signalling pretty clearly which product you actually wanted. Can you do that when you give a donation to the Mozilla Foundation?

(Maybe you can? I haven't donated to them...)

> If I buy a laptop from Lenovo I don't get to say oh I don't want to pay for tablet development, I just want all of this money to go to your laptop division.

9HZZRfNlpR is right. Not only do you get to say this, you have no other choice but to say this. Buying a laptop sends the strongest possible message that you're giving your money to the laptop division, and not to the tablet division. If you wanted to support the tablet division, you would have bought a tablet. And Lenovo will keep very careful track of this. They may choose to cross-subsidize, but your message will be received loud and clear.

But you do, you signal it with your money that you want tablet or laptop, it's very easy. FF is open source but you have to donate to some bizarre American social issues that you have no interest in or don't want to participate.