This feels horrible and would make me look away from any software that has such a clause. Then again, i use very little proprietary software in place and when i don't, it's mostly due to someone else choosing it for a project and me just needing to bite the bullet.
Though in regards to databases, i'm not sure why you'd fork over the cash and use something proprietary, unless you're trying to get rid of any sort of liability on your own end. Then again, i'm pretty sure that you could also find someone to offer support for your PostgreSQL or MySQL/MariaDB deployment, if you wanted to waste money (or did anything so interesting where such support would be warranted).
> Some cloud vendors permit you to benchmark their service but require reciprocity: you must make the benchmark reproducible and allow benchmarking of your own service or tool in response.
This is a bit better in comparison.
Though licenses in general puzzle me. For example, MongoDB is licensed under SSPL so anyone who offers it as a cloud service would have to open source their entire infrastructure: https://www.mongodb.com/licensing/server-side-public-license
And yet i don't think that Digital Ocean is: https://www.digitalocean.com/products/managed-databases-mong... (or maybe they offer the older non-SSPL version).
The whole enforcement angle feels like it would probably impact an individual who benchmarks databases instead of reading bunches of legalese more, for example, than it would impact a larger company that could "figure things out".