Surely Omari Hutchinson would be more appealing to these clubs, as a better (for them) alternative to BEK
If I was running a football club, I'd be seriously looking at:
location of the player
Where he is in terms of wanting out of the current club
returns in terms of goal contributions
and of course value for money
I think BEK is still too raw for either Newcastle or Palace. I think Omari fits Palace better as a replacement for Eze, and Newcastle quite frankly don't need BEK (ie - he's not a winger, striker or goal keeper)