Guys who set up dates then don't follow through?

So this is the 3rd time that a guy talk to me online, and was very responsive and keen to swap number and instagram.

They asked me out on a date, then I agreed. Then the guy start being flaky and stop texting back and never followed through on the date plan.

I doubted if I am ugly, and they refused after seeing my instagram. But it is not likely because my Tinder profile had my photos.

What is the reason for this?

Guys who set up dates then don't follow through?
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