It doesn’t really matter if they’re using commercial VPNs or the same upstream providers as commercial VPNs. Blocking an ASN is a million times more effective than blocking single IPs (at the risk of blocking genuine customers). I’ve had customers reach out to me asking to be unbanned after I blocked a few ASNs that had hostile scrapers coming out of them. It’s a tough balance.

VPNs often use providers with excellent peering and networking - the same providers that scrapers would want to use.