"Stop losing..." or "Unlock extra..."?

In a landing page belongs to "my friend", there are two options to promote the value proposition of a product about saving money.

One option is to say that using the product allows you to keep 30% you lose from existing revenue, the other option is to say that you can get extra 30% to your pocket.

Now, most mentors and consultants these days say that one needs to use the "Stop losing 30%..." because people react better when they are told someone takes 30% of their own cut rather than give them 30% extra but I wonder because "stop losing" is negative what term would you use?

Thank you so much for helping out,