When you purchase in bulk you are specifically purchasing Credits which can later be used to send any of our cards. You can do this by logging in to www.sincerely.com/account/ and clicking on "Credits"
You can also purchase bulk credits thru any of our apps anytime you want. Simply open the app to it's first screen and swipe in from the left edge. You'll see the main menu appear. from there you can click "Buy Bulk" to access our credit purchase screen.
If you have further questions you can contact us at firstname.lastname@example.org