Two things:

1st - the Email said:
A cap was put on rewards players can get by fighting a Ball or Cerberus.
The cap is 100 million Coins and 20 million Credits.

There is nothing said in that whether it is per Player, Realm or even Server.

2nd:
as to the Lab "Fix"
I did my 3rd Lab today for 60 Stamina and 10 Gems.
and when I tried to do another, then I got this message
"No more attempts left! Upgrade your VIP level to receive more daily tries"
I am VIP 1, so I did not get a "Free Lab" after my first two Labs.

and yes I had refreshed a couple of times today after this patch.