I renewed my annual legacy group subscription on 21-Mar. The billing details show $105 but there is no mention that the other $5 came from sponsorship amounts (my $5 test when you released this feature).
It would be helpful to have a breakdown of the charge and how it was paid e.g:
Annual Fee: $110.00
Sponsorship Funds: $5.00
Amount Payable: $105.00
Currently, other than the 'Member sponsored' entry in the Activity Log, there is no other reference to the amounts that have been paid by members that I can see.