If it's found to work well, it will be great for the young people struggling with money. The bar to entry of such a business is very low - you just have to test the blood donors for disease, which can be outsourced to numerous labs.
I initially wanted to make this comment sarcastically, but really, if we become capable of regrowing organs within your body you could legitimately make a business case for it.
https://en.wikipedia.org/wiki/Liver_transplantation#Living_d...
In a typical adult recipient LDLT, 55 to 70% of the liver (the right lobe) is removed from a healthy living donor. The donor's liver will regenerate approaching 100% function within 4–6 weeks, and will almost reach full volumetric size with recapitulation of the normal structure soon thereafter. It may be possible to remove up to 70% of the liver from a healthy living donor without harm in most cases. The transplanted portion will reach full function and the appropriate size in the recipient as well, although it will take longer than for the donor.
"Compared to the general public, most kidney donors have equivalent (or better) survival, excellent quality of life, and no increase in end-stage kidney disease"
https://nhsbtdbe.blob.core.windows.net/umbraco-assets/1433/1... [PDF, page 7]
To know if there is an effect, you need to not compare to the general public, but to a subset similar in factors which are associated with the outcome measures to kidney donors.