Quoted from dhalem:Look at it this way. I'm not buying anything right now because I can't use it across Android and iOS. If they had that feature, I would probably buy a table for $5. But because I want it across all of my devices, I'm not willing to buy it twice for $10. So instead of making $5, they are greedy and want $10, and in the end get $0.
It's debatable who is the greedy party in this example 
$5 for an awesome pinball simulation is not greedy IMO.
Especially if you consider that a piece of plastic for a real pinball is usually around $30.
