The year i surveyed a fair while ago it on a database it actually made a profit.
Hence i made it a rule with some filters for a mechanical system with form filters.
Now that i use ratings i haven't revisited it but like everything else may be losing in current times.

With the tote takeout and rounding down of dividends to about 18% and maybe people becoming aware of that years profitability imaybe now overbet.

Would be interested to know the period you surveyed what the s'rate was
and if it remained around the 20-21% mark?.