So this idea is kinda based on OSRS cash fountain but with a small change, we all know the economy is falling and we're losing people over the days but I'm sure we can rise again.
The idea is:
Make a fountain in edgeville where people can deposit items/cash to join a "lottery" made by you owners of the server, the initial idea is you make a contest where the winner wins like 100$ or 500$, you choose the prize pool.
The contest would take like 2 weeks(?), again you choose the time you want
How it works?
The more cash/items they throw in the fountain the more chance they have to win the prize pool, if the server fails to "donate" arround 100b(?) minimum the event fails and the prize pool is delayed to another event of the same kind.
Also wilderness slayer is hard yeah but giving pumpkins in slayer made them lose they're value, you should focus more on the PvP, it would be like PvM kill (same chance as pumpkins) gives "item fragment (need 3 to make complete item) and PvP kill gives "complete item"
Work these ideas if you want and use them to improve the server
I have some experience in owning servers (not RuneScape) so I know how hard it is to keep a player base stable and make everyone happy, hope this idea helps