I thought the debate here was should Betfair push people to the margin-rich sportsbook where 100% of people lose rather than the exchange? PC is a whole separate debate altogether!
However, we know it doesn't with Betfair as only 2% of exchange players win long term. That particular cat was let out of the bag, by accident I suspect, just before PC came in.
Where did you get that figure? I think it should be qualified as well. If you count today, then 50% of people will probably win, but if you count the number of profitable people who have been on Betfair since day one you will get a tiny figure and whether you include and exclude certain timescales or people. What about somebody that just turns up one day and has a punt and loses £5. Are they also classified as a long-term loser?