There is a solution currently in development for consolidated thank-you emails. All promised new features and enhancements should be completed by the end of this year, and most should be going live well before then, as we roll out new things one at a time or in small bunches from time to time.
You have our apologies for the delay, but until we were able to expand our staff in April, the first quarter of this year was unexpectedly demanding (you might say we reached a critical mass of new Merchants, which then started to snowball on us), so Development is finally starting to catch up with the backlog of requested new features and enhancements now. Just look at the recent spate of posts in our Service Status and Updates forum, where we post all official announcements of bugfixes and new features as soon as they go live:
BTW, for those of you into RSS, we also have a feed of updates to that announcements forum available here: