(Preface: I hope I got this into the right place, feel free to move as appropriate)

So, it was a while ago that I last logged onto Lam-Land, but I'm sure I saw quite a lot more inventory space available that the 20 extra slots on offer with U21. I am still waiting for my client to update, but perhaps someone can confirm: are we only getting 20 additional slots? Or do you purchase 20 at a time up to x amount of times? Or, perhaps, we'll see more slots being made available at updates roll out during the course of the year?