>>techno+(OP)
There's apparently a long history of honorary or symbolic reservist rank being given to civilian advisors; a good starting Google search is "dollar-a-year men".
>>tptace+e6
The direct commission program is ordinarily used for medical providers and they are on the same payscale as everyone else that holds their rank.
>>tptace+e8
I'm not aware of any contemporary cases where someone direct commissioned but agreed to a lower "dollar-a-year" payscale. I think our prior assumption should be that these four people are on O5 until we hear for sure.