Sky virtual is a good one, bet £10 and get a £5 free bet, you can guarantee profit by betting all 3 outcomes on a football match
E.g.
Team A 6/4 bet £5 = £12.50
Draw 11/5 £5 free bet =£11
Team B 13/8 bet £5 = £13.13
From 9.30pm on Tuesday, Wednesday and Friday (make sure you opt in)
Can really add up over a month/year for no risk.
+a £5 free bet every week from sky bet club for betting £25 in a week.
That’s maybe why they excluded my account from their sports promotions.