Idk what is May 13-14. They have stats for one day only.
Impossible to make a valuation on this sample of probably 3 days. I guess it will be just one whale you caught (otherwise you would provide lifetime stats). So it is a black swan. Something we all wish for, but impossible to predict. It is like if you come to different country, you get out of the airport and in 5 minutes you see someone being killed in car accident. You can not predict much from that about mortality rate on streets in that country.
I assume you have UK traffic mostly. Each UK player is worth of many hundreds at Bet365 on average (it depends a lot what kind of website do you have, e.g. how lame and how wealthy your bettors are). Your average will be slightly bigger, because you probably can produce whales. That is the only estimate I can give you.
If you talk to God, you are praying; If God talks to you, you have schizophrenia.