Number Cruncher: I'd guess that the Malta flights are scheduled because of regulatory, rather than commercial, reasons.
Malta is non-EEA so there is probably a limit of 15% on seat-only sales for charter flights. Whereas, if a charter airline designates its flights scheduled, they can obviously carry as many seat-only passengers as they like.
There isn’t actually that much point in making flights to AGP, PMI or TFS into scheduled because they’re inside the EEA so scheduled/charter really doesn’t make much difference. (Except that being scheduled can get flights in the OAG and on the CRSs - see the thread on Air 2000’s scheduled flights at
thread )