1 hour ago, Riamus said:It isn't all that rare. I had about 10 of them in the first week on 2 hour days (2 player) and about 7 in the first week on 2 hour days (1 player). If you are looting everything and not ignoring things you didn't used to loot, you should find them regularly.
You have been very lucky.
I do not skip over any lootable locations and have not found anywhere that many that quickly in any of my games. I have found a total of five of them by day 30.
That is way too rare to use on anything other than endgame items.