This would enable creation of multi-page surveys, as you could have the creation of each page lead to an offer to create the next.
Interpret _self as the card that was added that had a +*thanks setting. So if "page 1+*right+*thanks" is:
/wagn/
...then when you click Submit on "Survey 0012+page 1" Wagn offers to add "Survey 0012+page 2"
allow contextual names in thank you messages+discussed in support tickets
allow contextual names in thank you messages+relevant user stories