As usual I have no idea where to start so I'm just gonna get straight to the pointS. I decided not to make a post due to my previous experiences but Cloud Strife convinced me to do it.

1: You should add more European donation sites like Klarna (also Asian if possible)

2: It would be lovely if you added another feature rewarding donators with DPS (donator points) which would allow them to buy S-H-T-G = Super Hard To Get cosmetics [SERVER CUSTOM] which would be available in-game through daily+low-rate drop items [TRADEABLE] (as in 500xgold, 500x withering rose + extra MVP drops etc.). Rewarding the players with additional 10 points per 1$ (based off of currency [increasing weaker currencies {IN TIME} to allow everybody to support). Starting those S-H-T-G* cosmetics at 50-999 DPS while also increasing difficulty to farm them in-game requiring Illusion MVP farming (say 15x Illusion MVP custom item [99% drop rate]). Adding S-H-T-G* cosmetics would also create 100% F2P items while making sure that the gameplay is as bot-free as possible (support = sequrity)

Those changes would 100% increase stability of the server, add more funds to create more S-H-T-G* items, more events, more protection & more Man-Made-Events

3: Man-Made-Events.: I haven't played the server too long (less than a month) and I've noticed a HUGE activity of Game Masters, in my opinion it would be a positive boost to allow Game Masters to host their own events (while recording the event from their perspective [not to give away insanely powerful/expensive items])
-As an example, a GM using Infinite Fly Wing dropping valuable items (20x valuable item 10x (randomly 20x Withering Rose with 25% chance, 20x Gold with 25% chance) , S-H-T-G ITEMS (rare MVP - only S-H-T-G), [100K Zeny Coinx50(5x10 coins)], [1M Zeny Coinx50P(5xCoins)], [Old Card Albumx100(10x10 Albums)]. All items (IF able to code it so drop randomly while using a GM-Fly Wing).

*S-H-T-G would increase in volume with time.