Update Sep 2021: This seems to have been a temporary situation during the 2021 summer. Yield is now back to normal!
The last 3 months have resulted in a -1% flat yield on Bet365 Tennis, Hockey, ESport and Baseball.
Soccer and Basketball are still profitable.
They are definitely getting sharper.
The sharp bookmakers we use as “truth” are still profitable on all sports on all other bookmakers the same time period.