EI-BUD
ITs probably about 22 passengers per service. I think ops would have been on the ERJ-135 as the 145 wasn't certified for LCY. In fact jetMagic were the launch airline for LCY ERJ operations. The 135 seats "up to 37 passengers", so something around a 60% load, which is not so bad and probably approaching the kind of percentage load for viability, the yield is a different matter and 2003 was a very long time ago.
Its hard to believe that no-one attempted LCY in over a decade. I seem to have some recollection of cityJet at ORK in the 90s. Was that maybe an EMA flight? I think its mentioned in Pat Byrne's book. If I recall they lost their shirt from ORK that time, partly because support from SAAB was atrocious. Hopefully this time they will do well.