Interesting nugget in that they're reserving 5% of the IPO price shares for their users:
> At our request, the underwriters have reserved up to 5% of the shares of common stock offered by this prospectus for sale, at the initial public offering price, to individual investors. We call this our IPO Participation Program, or IPP. The purpose of the IPP is to allow our U.S.-based Etsy community and other individual investors to participate in our IPO.