Referral link

Hi I’ve been using TouchTunes at my local pub for the last 3 years. Whenever I had a new friend join me I gave them my referral link but after 3 years it stopped working. Just wondering if they’ve disabled this feature or if anybody still has any working links. I’m in the UK and the app changed around a year ago, ever since then the option from the settings had gone but the link still worked, wondering if it’s just disabled in my country?