nope i think its 50,000, it will bounce back to 10,000 when membership ends though so make sure that you don't have more sitting around because it'll vanish!
Actually, if your membership ends and you have more than 10K certs, they shouldn't disappear - you just won't be able to earn more until you fall below the non-member cap of 10,000 again.
Does anyone know if it's been raised lately? I'm not a member and am on PS4 and my certs are currently at 10,691.