"And we need more items that aren't RNG based in the Cash Shop."
That's an interesting idea. What types of items did you have in mind?
We used to have the premium account, where you could get an exclusive item every month. Something like that.
At one point we had regular new items going into the cash shops (like the mermaid chests) or the chance to bring back some of the old retired items that are almost extinct.
Even though you only could get let's say, 3/5 possible items per chest, it was easy to trade them and they still held a certain value.
So useful things which retain their value, instead of CS eggs that will most likely be natural and you'd have instantly wasted at least $20.
We already have things like the cosmic salve and the FBC which I appreciate.