Hey! Yes you can email invoices to your users (finally!) We heard that feature request so many times. :)

Re: multicurrency subs -- we thought about this quite a bit. At the moment you'd need to create a plan per currency, with our reasoning being that you'd want to control the FX rates on your own (and setting a price internationally is a very intentional decision.) That said, how can we make this easier? This launch is a start of our investment in this space, really interested in feature requests.