We don't know if others repent or not. Or what is in their hearts either way.
If people seem to need prayer, we ought to pray for them.
I don't know any Orthodox who are involved in Freemasonry.
Unfortunately my own family was for generations. I really think they didn't know any better. Some were very devout (Protestant-Baptist) and I don't think they would be involved if they knew of anything questionable. They were simple country folks, and those in it with them would have been simple country folks, all attending church together. Of course that may not be true for others. But I think ignorance is possible.
I'm glad the Church warns us not to be involved in such things.