The .3 seconds was added by me to actually stop the script killing itself, if removed occasionally the script will start spitting errors. (to be exact you cannot connect to the servers)
Rate limiting is how many requests you can make to the server in a time period yes? I don't actually know, that's my guess lol.
If so i personally haven't had a problem with mine and no one else has reported one so i would assume yes to your question
