A poor hungry man picks up my wallet. I didn’t choose to give it to him. This is not a “good” activity on my part because it lacks intentionality. So, what degree of intentionality is required for someone to acquire ajnata sukriti?
Thus, if a person unknowing participates in a good deed, such as helping a devotee, eating prasadam, giving a donation, etc., it must be true that the Lord has arranged those circumstances to benefit a deserving person, based on that person’s previous intentional good deeds.
Otherwise, ye yatha…and samo ‘ham, etc. would be meaningless. After all, isvarah paramah krishnah…sarva-karana-karanam. So ultimately Krishna has arranged for someone to unknowingly benefit, and that must be consistent with ye yatha. Therefore, the root of all this is Krishna’s fair and merciful response to a soul’s intentional behavior.