Glitched Den: jh02

For today's freestyle post, I will be posting a glitched den. Head over to jh02's den for a cool underwater den glitch!

At jh02's den, we find a empty looking den. When we look closer, we find  a porthole. 

Nothing is strange until we head to Sunken Treasures to check this item out. This is what we find:

Comparing this item to the jh02's player card, we see that the item is for members, but jh02 is a non-member! How did he/she do this glitch? Comment your ideas below!