Doctor was won around 500BTC in Bitdice (More than this winning) on 2 years ago or so.
I did not know BitDice is already 2 years old. Was it on same website or that was renewed?
Oh, it was at Dec 2, 2015 when alex posted it (It should be around 1 year+). Here
https://bitcointalk.org/index.php?topic=1273407.0Yes, it's Bitdice. It was happened when Bitdice still at V3
Mathematically Wonton's 300btc is bigger than Doctor's 500btc. Doctor won it on December 2015 when the price of bitcoin was around $ $350-450, equal to $175,000-225,000 while Wonton won 300btc last month when the price was around $800-950 = $240,000-285,000.
Both winnings were still great amount though and good thing is that both were legit winnings on legit site. Bitdice is rock...
Thanks we are doing our best

Small update as it's been quite a while.. Stay tuned, we are going to beta-test
new game soon, plus few cosmetic fixes will be added with next update, which should split the site completely for authorized users and guests, providing better speed and faster site load. We should also fix an issue when Safari users in incognito mode weren't able to use the site. ( We had to change authorization system back to cookie based as Safari doesn't save localstorage cookies in incognito mode preventing users from sign in )
Regards,
Alex.