great to hear the key works umm well i usaly flood attack WOW private servers (world of warcraft)
because of the servers are home based ( means the server is running on there computer) and when your running a server + web server for website ( account registration for private server ingame) + the ppl contected to your server using your bandwith.
google wow private servers and the top site is the best click any of them then do a ping to see if there alive then if so you can use doshttp to flood the website because most chances its on a home based to make sure scan there ip with nmap then do a whois on the domain to make sure its not on a dedicated server. and just flood the website flooding the website attacks the webserver and can do vital damage to it.
Hope this helps