Randomness and different factions.
Did you just become friendly/allied with the local faction.
They offer you more mission possibilities the more reputation you have with them.
I have no empirical evidence to back this up but do factions remember what missions you do and offer more of the same as you work with them.
I have been doing a lot of the smuggling missions so my BB seems to stock up on them with only a few other types.
im not allied/friendly with them yet.
anyway, i ask because they seem VERY committed to removing pirates.
look at the prices.
90k, ~20K, almost 20K...
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