I have witnessed people are wanting spawners desperately I have come up with an idea that would take effort if it succeeds as a suggestion.
So you would start off at Rank 1 which is “Chicken spawners” say 15k for one.
You would sell their heads for money when you have hit rank 2 you put the command /rankup which costs money as well.
Then it would progress into better spawners but more hard to rank up as you need a lot more money
Next Suggestion
If mobs wouldn’t naturally spawn on our server they would get spawned by the spawners that was suggested first.
It would be a challenge for bases on Factions as the entities would only be their spawners that would make it more entertaining and bring more population to factions because factions is not very popular or fun lately.
Hope you enjoy the suggestions ~Sky