In my opinion, only a private server with low rates (2x - 3x) can work well. High rates server are really boring, you get some days to reach the maximum level and after another week or maybe two you have the best Stuff and quit. There are only high rates to give the owner max. profit in short time, by people who donats to be the best.
There should be a server with start cap ~90, that could get adjusted to a higher cap.
The donation system is the worst thing, i ever saw. Of course the owner need some cash to cover his costs and motivate him to work for updates. But if you are able to buy 500 Silks for ~10 €, there will be ever the same problem called pay2win. Maybe it will be better to take a abo, like 5 € per month. No owner will do it for nothing, that should be clear.
Also ther should be no start SP, Silk per h (1s /h is enough) and you shouldn`t get start equip. All those factors otherwsie accelerate the maximum level and the result: bored people will leave and server closed - it is always the same.
I don`t know why there is nobody, see the potential of such a idea. There are still so much ppl, who would like to play SRO. The right team with serious intentions could earn a lot of money by long-term. Much more smarter then getting some money for 1-2 week, I think.