To add some additional context, the closed beta users knew from the beginning that the product would be paid after the closed beta. Some even asked about the price, and I gave them a ballpark figure, and all of the responses to the figure were positive. However, once I made the official price announcement, a few people were pretty angry (ironically, some were people who asked about the price and were ok with it at the time).
So I'm not necessarily moving from a free product to a paid product. It's from a paid product that was subsidized, to a paid product that is not subsidized. But to your point, I think the closed beta ran too long and shifted their psychology about the cost of the product.