There was another guy from Eastern Europe who got a lot of Covid shots. While the lockdown you sometimes needed a vaccination certificate to do some things and there were several anti-vax people who did want such certificates without getting vaccinated. So they either had to find someone willing to take their shot (and a doctor that didn’t do real identity checks) or they had to get a counterfeit certificate. There were some cases, where people got dozens of shots and sold their certificates.