...Have contacted Starbucks UK, and got the following response...
<letter snipped>
I'm the kind of guy that would write back something like this and quote their original email.
Dear Starbucks,
Thank you for replying. Please accept my word that I will no longer be frequenting your establishments.
I will continue to use the Windows Phone platform as it suits my personal needs better than any of the platforms you do support. It is a shame you can not see the opportunity in treating all your customers equally and choose to show obvious favoritism to the status quo. Growth does not happen through stagnation. At this time I will discontinue support of Starbucks but will continue to evaluate you in terms of how you make yourselves more convenient for some customers while ignoring others. I will instead use an alternate establishment for my coffee needs. After all, my communications lifeline is more important to me than your coffee. I have but one cell phone, my city holds a myriad of cafes.
Your offhand dismissal is most definitely not appreciated. Rest assured, your lack of response has been documented and will be vociferously passed along to the Windows Phone communities, of which I am a very active and visible participant.
If I ever have any questions or concerns in the future, I will remember what a dismal disappointment it was to try and reach out to you.
Sincerely,
<<NAME REMOVED>>
Former Customer
But that's just me...