the paper states
For instance, we know that they were
mainly farmers, animal breeders, horsemen and maritime traders with an established trade network
extending across the sea with Illyrian tribes8–10. A fascinating aspect of this population, as opposed
to their neighbours in Apulia, was their tenacious resistance to external influences.
The Daunians maintained strong commercial and political relations with the Illyrian
people, controlling together the area spanning from the Dalmatia to the Gargano peninsula and
had many cultural affinities with them.
they did not mix with their neighbours in Italy ...................I cannot see why people want to or expect them to have mixed with their neighbours the Samnites
We also know they kept trading for the pottery of Dalmatia until 440BC , before deciding to create their own to trade