I don't know the exact rules, but it usually takes a couple weeks for the OCC to register the options with the CFTC. Then trading can begin. So, mid-Novemberish.

With such a small float, put-call parity isn't going to exist - the cost of borrowing the stock is going to make buying puts pretty pricey.

I feel sorry for the people who bought puts on LNKD, which also had a tiny float.