IMHO the flight is fully booked in C. As other mentioned it is just before Easter.
Seat map looks like this:
7 seats left unallocated (stars), but not all passengers assign themselves seats in advance...
PS. Pls ignore spoiler - added by mistake - don't know how to remove
Thanks TPJ for looking into it indeed!
Still hard to believe they have sold out
all C class 6 weeks before ... Would be a dream situation for any airline
. I am more inclined towards below ISTFlyer opinion:
For 28 March 2021 and onwards, the schedule is a placeholder so TK might zero out those flights in the near future and cancel them.