FWIW
BAW001 says
currently stands at about 80%
As well as no radar data, no access to landline co-ordination, and the increased use of air/ground data links, probably in fact less than 50%.
I don't ever remember reading in the job description that it was part of my job to inform the piblic of what I was doing, in fact, the opposite. Even as a supervisor, I was instructed to refer any requests for info to the Press Officer
From memory the R/T on the web was provided, not by ATSP but by private individuals - also frequently not live.
What would be in it for the provider making, say, radar info available? A considerable financial investment, the fact that the unscrupulous would probably make use of it to bolster nefarious claims, weigh heavily against it. Furthermore "spotters" are not primarilly interested in ATC but only in filling their little books.
Sorry, no link whatsoever between this topic and "Safe Air Travel"
Lon More, here before Pontius was a Pilot or Mortus a Rigger.