Description
Place a £10 pre-match ‘Bet Builder’ on San Francisco 49ers @ Seattle Seahawks to boost any winnings by 50%.
Key terms
Opt-in
Tick ‘Profit Boost’ on your betslip before betting.Offer availability
12:00 on Saturday, 6th September 2025 to 21:05 on Sunday, 7th September 2025; one boost per customer.Event & market
San Francisco 49ers @ Seattle Seahawks – pre-match 'Bet Builder' only.Qualifying bet
Only the first 'Bet Builder' after opt-in qualifies.Minimum odds
5.00 (4/1) per 'Bet Builder'.Maximum stake
£10.Reward
50% profit boost; extra winnings capped at £5,000, credited as cash upon settlement.Eligible customers
Selected BetMGM account holders.Restrictions
Profit boost is non-refundable; general T&Cs apply.
Read full terms .
General advice and example for profit boosts
Place your profit boost bets at high odds to maximise your profits. Use the ‘Qualifying Bet’ setting on the Matched Betting Calculator to calculate your lay stakes. You’ll need to enter your effective odds as your ‘Back odds’. You can calculate your effective odds by factoring in your profit boost.
See my Profit Boosts guide for a complete walkthrough of this offer type.
How to lay a Bet Builder
If you’re looking to lay a football Bet Builder, you’re in luck. All you need to do is add the right combination of selections, and you’ll be able to lay your Bet Builder in one bet at the betting exchange.
Bet Builders on other sports tend not to be as straightforward, and you may struggle to lay your bet. In that instance, and depending on the offer, you may want to treat it as advantage play.
See my Bet Builders guide for a walkthrough of your options.
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With detailed walkthroughs for all the best offers as they’re released, you’ll be bagging recurring profits in no time.
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Matt Kirman – Matched Betting Blogger
Since 2014, I’ve blogged over £100,000 worth of profit, and made it my mission to make matched betting accessible to everyone.