I disagree

.
The BT Wholesale Performance test has always been the only speed test officially accepted by them as evidence of a throughput problem. As such, it must be intended for end user use.
Only the end user can perform it, and other than the speeds and acceptability the only other information information is the IP Profile. Which presumably the ISP has access to through standard links to BT Wholesale.
Likewise, the information requested when running it. If it isn't for end user use, why bother frequently updating and enhancing it on a public URL, when it could easily be behind an ISP login? Why make it run on non-BT Wholesale lines, until the IP Profile is required is requested?
My broadband basic info/help site -
www.robertos.me.uk. Domains, site and mail hosting -
Tsohost.
Connection - AAISP Home::1 80/20. 200GB. Sync 01/10/18 - 72382/13812Kbps @ 600m. BQMs -
IPv4 &
IPv6
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If you never think of anything off the wall, you'll never think of anything original.