A complete mystery.

Mining from the get go for several hours with provided wallet(s) + cpuminers.

./maxcoind listtransactions | grep category
        ...
        "category" : "orphan",
        "category" : "orphan",
        "category" : "orphan",
        "category" : "orphan",
        "category" : "orphan",
        "category" : "orphan",
        "category" : "orphan",
        ...
       
./maxcoind getbalance
0.00000000