Over 700 Minor realms had been discovered at the Inn, but a majority of the guests entering were mostly focused on a few dozen Minor realms which were incredibly valuable. For example, there was one Minor realm that was just a massive ocean.
Yet for aquatic beasts and other alien races, the realm was an absolute paradise for it had seemingly existed for millions of years, accumulating countless spiritual treasures, all unused because the realm was devoid of any living being. Naturally the fact that the ocean was one of sulfuric acid instead of water was the primary reason nothing lived in that realm, but for higher level cultivators that was only a minor detail.
There was also another Minor realm that had given birth to a very unique environment which resulted in treasures that were almost impossible to procure normally. Countless immortals had already flocked to that realm.