Couldn't you argue that they already have used this model before -- with FireFox? Stretching it a bit further, couldn't you say PayPal used the "less-than-free"

Couldn't you argue that they already have used this model before -- with FireFox? Stretching it a bit further, couldn't you say PayPal used the "less-than-free" model by giving their customers money for joining and for sending joins in its early days?