Ohhhh I hadn't realised those packs had better items in them. When I opened one early on, it only had basic items and so I thought the only difference was that you open three at a time and I decided it was a waste of money, since I could spam click scrounge to get a lot of hamburgers and dice. After grinding for quite a while I went back and tried the pack again and still didn't get anything new. I must've been really unlucky
Got it! Ok, so possibly ignore my comment about the pacing then! Maybe you could guarantee at least one premium item per pack, like they do in some loot boxes and trading card packs? Otherwise it's still 1 in 8 players who have the same experience as me when opening their first pack and then potentially draw the wrong conclusion and not try again.