I just had a look at the internet archive. AK was founded in 2002, correct?
In 2017, AK hit 10 million posts and 230,000 registered members. So, 15 years-ish to reach those numbers.
As of today, 7.5 years later, there are about 15.6 million posts and 355k registered members. If it keeps up, we should be on track to match or exceed those numbers from the first 15 years.
However, here's a Google Trends chart on popularity for the term "audiokarma" in searches.
View attachment 3155243
Looks like, as far as Google searches are concerned, 2012-2013 was the "peak" of interest and has fallen off but leveled out since then.