We don't usually share information about sales, as that is confidential business data, but suffice to say we're pretty happy and are going strong for ~15 years, now.
Our users come from all ranges, both in terms of company size (from single-dev shops to big-name Fortune 500s) and target area (mobile, desktop, web, services, enterprise, you name it). Elements is a general purpose programming environment, and I believe there's something to find and like about it for just about every software developer.
For example, while we have a strong focus on sharing code across platforms, the product is nit just about that, a lot of developers single-platform devs still love Elements for other reasons, even if they only care about, say, .NET, or only about Cooca. The multi-platform support is just one of a list of many benefits any individual dev might be attracted to (or not care about).