I think it's the same as Specialised Legacy Firmware, which doesn't seem to exist anywhere for me - not data points, not private beacons, not missions. I've actually been looking for selenium too, to no avail.
I am, however, giving up for a while because the nanobreakers and modular terminals I had in my hold last night (after spending 4 days looking for them) have mysteriously disappeared today (yes, I've opened a ticket). I can't take the risk of putting anything in my hold in case support try to restore them, and given that it takes days for them to respond to tickets...I guess I'm not playing the game until then.
Perhaps they'll have sorted out the item drop distribution by that point, too.