You are linking to an old Blog-post, not an active advertisement. By claiming it is an advertisement, you are either being disingenuous or you are merely misinformed by not having paid attention. Blogs show updates on a project, not current status. If you wanted to see what places are currently being advertised, you should have looked in the FAQ which has a section that says “WHERE MAY I CALL?” which states you may call any of the Supported Destinations or other FireRTC members. By looking at the Supported Destinations, you can see it very clearly states that the desired location has the following status: “United Kingdom (currently on hold)”.
This clearly is the result of you having a misunderstanding, I get that. But, I’m pretty much new to this site myself as well. It’s not difficult to double check your information before throwing out claims that are invariably false. I hope you continue to use this service, as it’s an interesting one, but if you don’t, I hope you find a service that offers what you are searching for.