what is" X-Middleton/1" Suffix, added on "iplocation.net" homepage?

[adhk 0]

Hi there! i'm an frequent visitor of "ipleak" website. my Question is not with you, just asking & share with other privacy fans. on Nov, 26th 2021, when openned "iplocation.net" site, in the user agent report a Suffix " X-Middleton/1" is added, ie showing; User Agent ; 
"Mozilla/5.0 (Linux; Android 6.0.1; SM-G900F) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.138 Mobile Safari/537.36 X-Middleton/1" .
would anybody help me to know this suffix, and the pupose of it? i've never seen such thing on other websites (seems to be a FLAG)!  \\Sorry i didn't know the related page on your site for my case\\ Apprecite your reply, idea on this matter!    many thanks: Adel

[OpenSourcerer 1435]

Looks like something that site is adding itself. My UA string is customized and is reported correctly right until this unknown suffix. Since they also advertise a few VPN providers, I deduce that this is removed if you connect with one of the advertised VPN services.
Verdict: Make a very wide berth around this service, it seems to be a marketing gateway.

[downbythesea 0]

It sounds like the site is using "ezoic.com" as a front-end / reverse-proxy.

https://www.ezoic.com/faq/#cdn