[Question For SEO experts] Link power diluton

Hey blackhaters,

What is the value of having only 1 backlink to your money site on a PBN, if I have 2 backlinks pointing to 2 different sites does that split the power of the links to 50/50, or the value is almost the same (let's say it only dilutes 20% of both links in relation to the power of having only 1 link) or does it only starts to dilute highly when you have more than 10~ links on a site ?

Opinions of people who have hands-on experience are preferred.