I think a lot of the 'fad app' sales (e.g. iFart mobile) would fall dramatically if Apple implemented such a policy. People often buy apps charged at $1 on a whim and have no complaints. But 2 days later, they may decide that they've had their enjoyment and refund it back after novelty value has worn out. if there was an option to do so However, such people would not be disatisfied not to receive a refund as it was money well spent, just that they would probably never use it again so if a refund was available they would take it...
Separate install and download? Get real...
Separate install and download? Get real...