😁 people always ask this.. and that's all good. But there is not just one answer.
The measurement I tend to use is *not how many people use the relay.tools instance, but how many install it and use it with their own networks and servers. So far, that number is less than I had envisioned (1-3 that I know of). Also I can see many of the reasons why and I know what needs to happen.
The instance I run currently has approx 60 relays and .. (hundereds?) of relay members. This is probably more what you were wondering about.. I don't tend to do a lot of marketing either, because expanding this instance past what it already is, that just isn't really my main goal here. To be distributed there needs to be many instances.