As stated in “Concordium Free & Open Grants Program”:
All code produced as part of a Grant must be open-sourced, and it must also not rely on closed-source software for full functionality. We prefer Apache 2.0, but GPLv3, MIT or Unlicense are also acceptable.
Bictory isn’t open-source, they have not open-sourced anything (yet). How did they get the grant from Concordium?
As far as I can understand, the grant is split into milestones, and until Bictory reach each milestone (where they receive the grant money), they are not required to open-source that code.
There’s BictoryNFT application form which has description of the milestones. Turn out it is no the requirement for a project to be open-source from day 1.