[Drebin]

-What do you mean with "So we can't just have the map?". You can open your pawno and create a new gamemode and save it without editing and then load it into your server. This is the least amount of code required to run your server
-There are so many RP servers because the majority of the SA-MP community likes roleplaying
-A filterscript is a script that runs alongside the gamemode and adds functionalities to it

You might also wanna read this: https://sampwiki.blast.hk/wiki/Terminology