I certainly wouldn't pay for it and I don't see anybody else being willing to pay for a delayed quote on each page. Simply because it is useless.
And that pretty much ends this discussion then.
We're not trying to compete with QCharts and the like. We can't afford to.
Personally, I'm just fine with going elsewhere for quotes, as I've always done and as I'm sure everyone currently does. And less work for me as a programmer and less risked money.