I don't know but I went from 0 to 48 mk6 hyposyringes Tuesday. 20 of that was from challanges but still, I was happy with it.
I spent 240 from refreshes and some bonus energy as well.
...
RNG
...
Confirmation bias
In all seriousness, if you aren't feeling it, don't farm it. Sometimes you make your own luck.
I had a feeling I should drop a refresh on farming 5dot health mods and got two 5dot speed primaries and and gold mod with a speed secondary.
It was the same thing with the hyposyringes. I was "feeling it" and rolled the dice.
Think it's preposterous? Well I think your tin foil hat is preposterous.