It is true that therse beads have been misleadingly used as prrof of 
Russian influences.   I believe I read somewhere in the distant past that they 
were actually made in the present Chech (?) Republic.
They have been found at Hudson Bay Company sites and we even have a few 
from the California missions, so they were really international.   We have 
basically ignored the fact that native peoples had bead preferences which the 
Europeans needed to take into account if they wanted to conduct trade.   A 
question of "agency".

Bob Hoover