I just went to the conference fair one like that, it had a half dozen meeting rooms. I sat in the room for the hour presentation and it was definitely a formal meeting. They tried to reduce my pay from $34 to $17. Then their Editor tried to change the first section questions to informal and deleted all my narratives about the presentation I sat through. Wrong! I just called them on it.
I used their help desk internal email and then called extension 505. The support rep checked with his supervisor and they say they will be issuing me the additional $17 in the next pay period. So give it a try. I had reported earlier that month that every other assignment had a different agent then what they listed as a target. They said they were aware that the project was not going smoothly, but that they had no control over who showed up and to just evaluate whomever does the presentation. They said to me to just be sure not to shop the same person twice and they have rules to compensate for that difficulty for driving all the way there.
I explained that a conference center with several meeting rooms was way more exposure to our anonymity than going to one meeting room. I had gone early and spent time looking at materials (business cards) on chairs to see if I could locate the target agent, plus I cruised the booths and I went into each meeting room. Luckily there were nearly a hundred participants and it was easier to blend in. But I was there about 2 hours and no sign of the target agent. I suggested they describe this event as a healthcare fair and they may need to increase the pay for this location/event in the future. That in no way was this location a 20-30 minute "informal" shop, regardless of having several booths. I followed the instructions and went to the (Client) closed door meeting. It had DVD/Slideshow formal presentation and that was at least an hour. And I gave it my all to try to shop their target, I had all the collateral. I was a little miffed that I was being put at risk so early in the healthcare season because I did not want other agents seeing me there. Luckily, I just drastically changed my hair color now and hope that sometimes fairs can be a blur to the agent.