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Pluralistic: "If buying isn't owning, piracy isn't stealing"
(pluralistic.net)
This is a most excellent place for technology news and articles.
You would be in the minority, piracy can increase sales because a lot of people see the value after the trial period and pay for it.
Linky for source of one company.
So where did the one sale to four come from?
Another Linky
How many do you want that corroborate that it increases sales and not cannibalize them?