Answer:
the fact that the entire town has paid to see the “show” again, but this time they’re bringing things to throw at the duke and the king
Explanation:
You can confirm this by checking this part of the excerpt:
<em>"and they warn’t new-comers this time, but people that was at the show the other two nights"</em>
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So, those were the people that were there a second time. No newcomers. And what they were carrying is described right after:
<em />
<em>"I stood by the duke at the door, and I see that every man that went in had his pockets bulging, or something muffled up under his coat – and I see it warn’t no perfumery, neither, not by a long sight. I smelt sickly eggs by the barrel, and rotten cabbages, and such things"</em>