Yes, it is legal. As per the event page: The promotion is not an offer to buy or sell securities, nor are the certificates sold in the promotion securities.

Once your purchase is confirmed, we'll send you information via email on how to fulfill your purchase and your certificate. The certificate is redeemable either for securities through a broker-dealer for those who setup an account, or else for merchandise.

All of the proceeds from our Early Is Everything Pre-IPO Pricing Event are being donated to MissionBit, a Bay Area nonprofit that sponsors underprivileged high school students in the San Francisco Bay Area to learn computer development skills.