Nonary Engrams are supposedly to cap out at 20 purchased, however, I am no longer able to purchase them after only purchasing 16. From looking on twitter, it seems at least one other guardian has the same problem I do. I will not lie that I'm very frustrated, especially because I didn't get a single thing I wanted. However, people not being able to get 20 is a bigger problem than my personal frustrations, so I hope others can boost this enough for the dev team to see.