Just an update - most of the companies I wrote to haven't responded. The few that did have a canned response along the lines of "thanks for writing us, your input is important, we will respond sometime in the next decade if this is urgent" or something similar.
Obviously I wasn't expected them to immediately write back a personal note explaining that they expect to have a system setup this week for accepting crypto currency, but I did want to reply back to the thread with an update.
To some degree this is like a squeeky wheel - the more people inquire, the higher on their list it will be to address.