Because it was paid for. Plain and simple.

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Do they expect the end to be like a butt plug? How does that attach otherwise?

Unscientific answer is yes. Enough weight, the rubber of the balloon has mass, quantiy and gravity would cause the bottom balloons to pop. I figure that the popped balloons have a better chance of smothering you in shards before you could be crushed by inflated balloons… in case that was the next question.

30% growth after a 20% layoff huh?