Topic: What will you do...
When you get 50,000 players which you would so gladly like to fall into your lap.
How will 50,000 players live on something like 50 islands? Surely that won't work out well regardless of how you slice it. Eve online splits over 2000 solar systems (equivalent to your island) between i'd guess 250,000-500,000 players.
How will you add more islands though? Travel is already enough of a pain as it is. What will travel be like when there are 200 islands? Will 200 islands be enough? What about if you need 2000 islands to support 50,000 players? What kind of a nightmare will travel and logistics be like then?
Have you even thought this far ahead?