Because they won't make money with their current approach.

It seems they'd be a prime acquisition target from major airlines. An investment could keep them afloat until that is realized.

Did you mean... an investment in airline x could keep airline x afloat, right?

It solves a problem for a niche within a niche. Market size is extremely small IMHO. And I'd doubt people are willing to pay for it.

I agree to a point. If they end up being reasonably successful in predicting this information, and they can convince enough people of this, then someone's willing to pay for it. The latter problem is probably the tougher one. If people believe it works, you could sell to, say, business travelers--or more obviously someone like Fedex.