Hi Laura,
They probably do have viable seed. They definitely will not come true. They are hybrids. Plus Echinaceas cross pollinate easily so that makes it even more difficult to hopefully get a seedling that looks like the newer cultivars. If you plant enough seeds, you could get lucky and get one that looks like the parent, but chances are low.
Remy

Thanks Remy, that's what I was thinking. I've seen a few seed swappers listing this seed for trade but thought I'd ask for some feedback before doing the same. I wouldn't want to give anyone false hopes...they are such pretty coneflowers. Laura