Recent Brave Rewards or the Lack Of

I have been a verified user of Brave Rewards since December and in that time I have collected over 400 BAT tokens. A lot of these came from people joining using my referral link which I am very grateful foru and I usually average around 35-40 tokens per month and I have not had any problems withdrawing to Uphold. However since the rewards have changed this month I have only received 2.5 tokens although I have been using my phone and laptop in exactly the same way as I always have. Is there a reason for this and has anyone else experienced this?? By the way I’m not complaining I’m just curious as to what other people think. Thanks for your time.