[Mauzen]

So, if you just upload the amx theres basically nothing they could steal or scam. They might "take over" your server, means they ban you, and run the server themselves. But then they couldnt update the script, theyll always run the same gamemode. Sure they could decompile it, but still wouldnt have a source they could use for anything. Stealing a script by deamxing it is just a myth.
To be absolutely sure, make a unlock command, something you must type on startup, else every player will be kicked on join.