@james would be the best person to answer your question. We have spoken about stats on Slack, though I am sure by now they have been 10k’d.
From the usage statistics point of view, I personally would love to know what impact being on Installatron will have on the overall sites using ClassicPress. Though for accuracy that will probably only be useful to look at in 6-8 months to see if those sites stay around long term.
I haven’t run the active sites numbers in a while, and this needs to be automated. However I can tell you those numbers from BuiltWith are way too low - we should have several thousand active sites by now.
That seems a pretty dumb way for BuiltWith to gather statistics. No professional or business site likes to have something like that in their footer - they only want info relevant to their business. And no custom theme developer would add something like that just to aid statistics.
I didn’t know how they determined this, but I wouldn’t have guessed that this was the way. Like @anon95694377 said, it seems like a dumb/unreliable way to go about it.
I’ve reached out to them via their contact form to see if they would give me any helpful information. I’ll let you know if/when they respond.
Version/CMS detection tools should be using this tag to detect ClassicPress. It’s structured the way it is for backwards compatibility (early on, we ran into some problems with tools detecting things like “insecure site running WordPress 1.x”).
Site owners can remove this tag using a filter if desired. This means they want to opt out of detection which is also fine. This is the same situation present with WordPress.
tl;dr We don’t need to make any further changes in order to enable this detection.