there's a small amount of people who want a proper alarm,
a smaller still amount who want maintenance,
a smaller amount again who want proper signalling,
& not all of these want a URN
For me it's a small niche market of those who are happy that the minimum price for a decent quality intruder alarm in a 3 bed semi is circa £600ish. No SSAIB / NSI here.
Those customers do exist, just don't expect a flood of them.