there is no such thing like mysql account(yes teher is but they are for web sites they cant handle a mmorpg), mysql is a sql server technology, you install a mysql server software(wamp and some other software for windows, but there are some linux versions built to be a mysql server,using them can make you get more performance)

and Gstnet is mp plugin, mysql plugin is somthing else( http://www.coniserver.net/ubbthreads/showflat.php/Cat/0/Number/806987/an/0/page/0#Post806987 in lite-c section but has c-script version) but you can use them together. mysql plugin comes with a cool example about getting info from server.

you must use your own mysql server(as i said in my prev. post you connect to server using its ip adress) and info is s stored in server's hdd, there is a database file.(directory is depending on the software you use, wamp uses a folder called databases)

AND you dont have to use mysql to build a mmo, you can use microsoft sql,psql etc.(but i dont know a plugin that uses these types of sql databeses)

to be more clear, Wamp(mysql server software) is something like "micrososft sql server 2005" but uses mysql instead of mssql


edit: the thing about web hosting servers cant handle mmo is that:

in shared hosting services as in the link, shares a server with more than one site(changes from hosting to hosting between 30 to 300) and they cant handle a mmorpg that constantly does losts of queries, this will make the other sites hosted on the server load slow and hosting company wont allow you to do that.

at this point you can try VPS s but believe me even you re creating a private server for a mmorpg(me and some of my friends created a knight online server before) after some number of users VPS s will not help too, you need to buy or hire a machine to use your own.

and let me add:
if you are making a very basic mmo that doesnt have much inside you can use your pc, for tests.

(the knight online server on my pc was able handle 55 players. sql server and game server were running on the same machine)