They give access to IPO allocations before shares hit the market. The only problem is they want you to hold the shares for 30 days. But that's ok because you can just short and lock any gains you might have by using another account.
Can't find any of those yet, https://www.nasdaq.com/markets/ipos/activity.aspx?tab=pricings on www.iborrowdesk.com is the data late on their page or it's not allowed to short , during ipo day ?