Yup, seems far fetched.
Yup unlikely, even if we look at gross numbers.
We have seen the 5.2M viewership of the Griz game, let's assume all 4 games together have had a 10M viewership (assume the Griz game was the largest by far).
Now, take 0.3% (*) of these viewers bought Blazers Merch, given what I have seen for official jerseys starting at the $50 and going up, 10M * 0.003 * 50 = $1.5M - the broadcasts in China were free, so I doubt they saw a lot of income from there, to get to the $150M, you will need to either have 100 times the purchase ratio or 100 times the transaction number. That just seems unlikely.
But, what do I know...
(*) - The percentage of viewers that purchased merchandise in the US is estimated at 1.7% for the entire year and many of these are likely long time fans, I used 0.3 as it is about 1/5 of this and even this is a very generous estimate for a week+ of basketball, even if there is an excitement of a new thing.