Thanks for finding this Terry!
A couple of observations/ comments:
I didn't know TIME was around back in 1930, but sure enough, it started in '23.
The TIME author states that there were 1 million members of the IBSA and WT back then. Maybe that's what Rutherford told him, but I think by any measure it was nowhere near 1M in 1930.
TIME categorized the Bible Students as a 'California Cult' even then. Pretty smart!