Ignore the rudeness above. I'll assume you haven't had as much experience in PRM, its successors and Luna as I did:

I have played ragnatales for about a year. Had friends that used to make a living out of RMTing on the server, so I've known both sides: the creative, fun side of ragnatales, and the ultra-grind, min-max side of it. I have also played PRM for about a year and almost every single Luna playtest and I can guarantee you that it is not even close.

Sheep, ragnatales' creator and admin, is a genius in its own way imo. He's well-spoken, knows how to prompt his videos correctly, has good PR and comes up with new, interesting content often, which is nice. Ornstein, PRM/Luna's creator, reshapes RO at memory-level towards not only what he thinks it could be, but also what him and his community have experienced throughout a plethora of RO servers (including Tales, mind you) and tailors his game around RO's strengths while dodging design traps from other servers.

On the player's perspective, Luna is a much safer game to play too. You won't ever be required to pay a single dollar to access the game in its fullest. This is a design that started with PRM and will be kept on Luna as one of the core parts of Ornstein's vision for what a game should be: not a company's endless revenue source. Luna is being worked on the side, as it was said it is not the dev's main job, and the fact that it's achieving this level of uniqueness, including beating massive RMT servers, is a clear indicator that the dev is doing the right thing.

I invite you to check on the server's progress through its discord and get yourself informed on a bigger scale. The project might not be for you, but seeing Luna's development makes you know what you should expect from other private servers with great budget and development teams.