Sorry for any inconveniences encountered with any pool issues.
For the more reliable earning estimates, I would recommended to refer to 24h estimated and 24h actual data at the pool. To maximize earnings using any profit switching software you should use current estimate. However it is indeed changing as network difficulties and coin prices do.
Current estimate figures in API sometimes (often enough) don't match the figures on the website (about 24h figures I'm not sure).
Besides, the pool have connection issues. Why wouldn't you put, say, a 1% fee and rent a better server or hosting plan, etc.