[JudyinCanada]

How the heck would they know what it is and how old? Good grief. Sounds like they’re looking for some fame, and possibly funding.

[BroJoeK]

JudyinCanada: "How the heck would they know what it is and how old?"

They don't know exactly what it is, yet.

"This egg, which is about the size of an ostrich embryo, likely belonged to the Bonapartenykus genus – a small, carnivorous theropod that roamed the region during the late Cretaceous period."

"Likely" means they haven't x-rayed it yet and so don't know for sure.
Once they x-ray it (or however they do that these days), they will know for certain what it is.

Knowing what it is will tell them approximately when it lived along with others of its same type.
There are also many methods for finding an ancient object's age including geological analyses (stratigraphy) & radiometric tools.

JudyinCanada: "Good grief. Sounds like they’re looking for some fame, and possibly funding."

Of course they are.
Everyone wants to be recognized as outstanding in their fields, and to be paid according to their merit.

Whether these ancient eggs are truly as remarkable as their finders hope, is yet to be fully determined.
We can wish them well but also notice that these are far from the first dino-eggs ever discovered, and the chances of finding actual dino-DNA are roughly the same as a snowball's in hades.