My main problem is this. The "challenge" made by Satan was that people would not serve Jehovah if their life was hard. Jehovah said "Bet!" So, what the Watchtower is saying is that because currently much less than one percent of the population of Earth is serving Jehovah, that somehow this makes God a winner? What kind of math is that? It appears that not only has Satan won, but it was a beat down of Biblical proportions. Can we just declare him winner and move on?
This is actually not the worst part though. Yes, when Satan's conditions were present, more people went Satan's way. Fine.
Then God gets a crack during Paradise and what happens AFTER the 1000 years. Despite the perfect conditions, the number who choose Satan is STILL like the sands of the sea compared to the faithful.
Satan wins this challenge under any condition, and he wins it going away...