I used the more pedestrian

for ip in $(dig +short pay.weropay.eu)
do whois $ip
done | grep OrgName

and it also shows "A100 ROW GmbH". A superficial search found a job offer by that company at https://www.amazon.jobs/de/jobs/3172916/physical-security-cluster-manager-data-centers-dc-security The employer is "amazon web services".

@eloy @can