From the best of my understanding, it constantly updates the earnings estimates as you mine, rather than predicting based on hashrate. So as you continue to mine your earnings estimates will increase until the daily BTC payout or auto payment threshold is reached.
Also, great job on this pool. Very well designed, love the coin-based vardiff, and it's definitely the most profitable multicoin pool that I have used thusfar. My only wish is for more detailed stats pages (including pool top 15 MH/s and Shares/s, past blocks and their rewards, pool/user hashrate graphs, etc.) More detailed transaction histories in general (ex on the User Ledger, show the payouts for the user from all coins, and the estimated BTC exchange rate per coin.
A graph similar to the BOTPOOL layouts dashboard would be great; charts for Pool hash rate, Network hash rate, User hash rate/share rate etc. Maybe just a general website UI update, it's basic and bland looking, could use an update to a more modern style.
Overall very well done, love the pool and can't wait to see what's in store!