Slim - let’s just say that the 20 million LDS members physically turned up to general conference. If you add on another 10 million who chose to stay at home and watch it on TV ( 20 + 10 = 30 million in total attendance, or 1/3 chose to not physically show up). If you account for the 33% engagement factor, which would be 10 million. This isn’t to far of from what the JWs are anyway. To be honest I really don’t think there would be to much in it, with membership numbers.
Then the question has to be asked? If the JWs were to allow their members to attend the memorial by TV link up if they would also produce the same numbers.
If anything I think the lds attendance at general conference would kind of support the notion that Wt is been honest in its membership numbers, and isn’t cooking the books.