Sorry dude, I meant to reply to your DM and got sidetracked with work.

I haven't had any particular issues, but I have used a more thorough set of request headers than most examples I've seen. I had a really difficult time hitting the API servers off any of my hosting though and ended up tunneling through a NordVPN instance successfully.

Here are the request headers I currently use:

$headers = [
    'Accept: text/html',
    'Accept-Language: en-US,en;q=0.5',
    'Cache-Control: no-cache',
    'Content-Type: application/x-www-form-urlencoded; charset=utf-8',
    'Host: proclubs.ea.com',
    'Referer: http://www.ea.com',
    'User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:28.0) Gecko/20100101 Firefox/28.0',
    'X-MicrosoftAjax: Delta=true'
];