It seems that the further to the right an entry is, the harder it is to find. However, this can be pushed to the extreme, making some things nearly impossible to find! (looking at you, Phoenix, Bus, FCR-900, Berkeley's RC Van, and Euros.)
For example, the Phoenix is extremely hard to find. What do I do? I removed it's entry from POPCYCLE_GROUP_RICH and moved it all the way to the beginning. I then go to The Strip, and voila! Phoenixes everywhere.
Another example; try finding an Emperor i