In reply to Steve.

Unlike a DrupalCamp or any other business-oriented conference, as someone indicated above WordCamps are mostly attended by hobbyists, DIY folks and people working within the WP ecosystem. For many years now I've only seen 6-figure clients invited by agencies for a meeting, not attending just like that.

Since we also go to technical, marketing and business conferences (I've spoken at DrupalCamps too), things are not comparable at all.