Ignoring the vocal minority
By now, the Twitterverse is probably clamouring for you to make your web app free or requesting you add new bells and whistles or complaining on how lame the new redesign is.
Anything that’s worth doing will get you backlash from a vocal few. The thing is, now, more than ever, the vocal minority can be heard loud and strong.
Tune it out.
I would be more worried if no one was complaining.