The biggest offenders on mass email blasts had little or no valuable content in their Mobile App profiles. Which brings us to today's big tip for trade show exhibitors: Stop pushing and start becoming more "pullable." Event mobile apps are sparking more/better exchanges at conferences and trade shows, be that attendee-to-attendee, exhibitor-to-attendee, speaker-to-attendee, and so on. Enough with the spammy messaging.