Maharajji did not seem to be "deciding" how to react to any devotee and in fact advised others to...
SEE GOD IN EVERYONE. IT IS DECEPTION TO TEACH BY INDIVIDUAL DIFFERENCES AND KARMA.
Nevertheless, when pressed, he could "explain" his behaviour:
Once I was chastising Maharajji for giving photos to people who were wordly and didn't care about him.
He said, "You don't understand me. If I tell a man great bhakta(devotee), I am planting a seed. If a person already has the seed planted and growing, why should I plant another?"
I said, "You are telling these drunkards, liars, and dacoits that they are real bhaktas.
They will just go home and carry on their old behaviours."
Maharajji said, "Some of them will remember what I said of them, and it will make them want to develop this quality in themselves. If ten out of a hundred are inspired in this way, it is a very good thing."