That'd be super unethical and they point out it passed their IRB so that's unlikely to have been the case. I believe their system is like the US where the docs/

That'd be super unethical and they point out it passed their IRB so that's unlikely to have been the case. I believe their system is like the US where the docs/pharmacies are reimbursed for each dose given so the prosecutors likely were doing basic fraud detection and saw that 100+ doses were associated with the same person which lead them to investigate -- it's probably not illegal to get hundreds of vaccinations hence the lack of charges and it just so happened to have provided an interesting data point for researchers.