So, letting people try it out it for two weeks prevented them from buying it? That doesn't reflect well on customer satisfaction.
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A free trial gives them a chance to waffle, and usually by the end of the trial they have haven't put in the effort to decide they want to buy the product, so they don't. Paying earlier also creates a commitment bias.
I've seen this over and over again in products. You want to give people enough usage that they can have confidence the product is worth paying for, but not enough time that they waffle.