But not the preferred workspace environment of targeted audience: marketers that create ads.

You could always try to run it in WINE (I've seen people running Windows only apps this way in Ubuntu, e.g. MS Office, Noetpad++).

But you'd have to go out of your way to get your hands on it since the Download button is inert unless their javascript can confirm that you are in fact using Windows or so. Doesn't seem to work with wine's built-in browser, and I couldn't get past the clickwrap EULA with an old chrome-based browser running under wine either.