You mean, gives the bookies a new edge.
If you aren't comfortable letting the bet ride you shouldnt back it as a straight accumulator. You'd be better off doing a rolling acca to the point where you no longer felt comfortable staking. Anything else is just giving equity away. It's simple maths.
The fact the bookies so actively advertise cash outs tells you all you need to know. You're just setting fire to EV any time you cash in. I genuinely don't understand why anyone ever cashes in. If you weren't willing to let it ride to win the lot, why did you both doing so many selections in the...