There's double trigger RSUs and so on that allow you to have reasonable tax treatment, due to the theoretical threat of loss if liquidity isn't available. I worked at a company that had this at least while I was there.
In theory they provide market liquidity such that for anyone who REALLY wants to go, at any time prior to and potentially even during the event, there remain some options available for purchase; as opposed to basically spinning the lottery on whether you get to go or not, especially for oversubscribed events.
You have to ultimately pay taxes in USD and have to accept settlement for debts in USD, but otherwise you're free to accept anything else you'd like, really.