I used to be the bric-a-brac person in a charity shop, and I wouldn't put that out on the shelves. Too much of a risk a customer might get hurt by it.
I also tell somebody in a charity shop about this sort of damage if I do see one that has been put out.
It's the business of it could "go" at any time and hurt somebody that would worry me.
I'm afraid it's really a lost cause.
Having said that, there is a certain sort of very highly collectable glass, Monart, which is often a jig-saw of annealling cracks, but they still do hold together.
It was made way back in the '30s, and the place the Ysarts worked in was a bit primitive. The shed that contained the annealling oven was wooden and very draughty, so the cooling temperatures were not adequately controlled.
Monart "jig-saws" are still sellable, but they don't make much. I have one, a very good piece which I got for £20. I would have left it sitting, if it had been perfect and a proper (sky-high!) price. It's still decorative.
I've had other bits of glass just develop these cracks while sitting on my shelves.