Interestingly, Bogdanov founded one of the first blood transfer institute with only volunteering donors. At that time, most blood donations were paid. Later on, thanks to better conservation techniques, less blood was needed, and volunteering became generalized world-wide.
Bogdanov also believed that blood donation could rejuvenate people. His wife said that he looked 7-10 years younger after his experiments. But, in the end, he died, because he received malaria-infected blood.
That is interesting to know that some 2019 issues already existed more than a century ago: blood transfer, paying for blood, rejuvenation, etc..