What is ‘blue dot fever’ in concert touring and why is it happening now?

Blue dot fever is the current term for musical acts that are not selling very well so they are cancelling dates. Current affected are The Pussycat Dolls, Meghan Trainor, Zayn Malik, and even Jlo. Yet Hillary Duff, Sabrina Carpenter, and Olivia Rodrigo are still selling out venues. Is it just a case of no one wants to see the blue dot artists anymore, or Is it current economic trends?
What is ‘blue dot fever’ in concert touring and why is it happening now?
What is ‘blue dot fever’ in concert touring and why is it happening now?
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