Or the upsell – depending how you look at it.
Buy a Playstation – what’s the next thing you buy? An extra controller, a game, a stand.
Playstation3 even lost money for every unit they sold. Why? Well they needed to establish market share as all the profit is in peripherals and games. If they can gain that market share they can keep profiting for each and every add on purchased.
You see the same with iPods, Beds, Tvs.
But how can you do the double sell for services? Whereby you sell an excellent product but you can maximise your profits through the value added peripheral services. You are probably creating more problems with your solution anyway – so why not do the double sell and solve them. That would be a real big win.