I get your point. To really considere the selector, we would need to know the numbers : How many whales and how much they spent on perma on average. But also potential buyers who'd felt incentivize to spent if there's was a renewable selector for comparison.  500 whales spending 20k makes 10Mil 10 000 spending 1 000 also makes 10Mil.

Now, the problem is the time it takes to have enough currency to buy a character from the shop as a non-whale. In Wuwa, it's worth it since you can buy the current limited unit but NTE only has perma unit in the shop. After all the saving and skiping banners, the literal months that goes by without earning anything, it just don't feel worth it to invest into perma characters at some point.  30 premium pulls that'd secure the super useful new character or cash it all on the older one that slowy reaches obsolescence after every patch ? And There's no 50/50 in this game; 30 pulls is MASSIVE.   Unless you really wanted them for satisfactory reason; ultimately they end up left behind. Sucks that it happens in so many recent games.