10% of production is 10% of production. Period.
Whether it is monthly or annually is the same.
Yearly-
120,000 oz per year x 10%
or 120,000 x .1 = 12,000
Monthly-
10,000 oz per month x 10%
Or 10,000 x .1 = 1,000 x 12 months = 12,000.
Regardless, the agreement clearly states that the Namoya streaming deal is CAPPED at 12,000 oz per yr.