Ante Progression
600-1,200 with a 100 ante, 8.33% of big blind
800-1,600 with a 200 ante, 12.5% of big blind
1,000-2,000 with a 300 ante, 15% of big blind
1,200-2,400 with a 400 ante, 16.67% of big blind
1,500-3,000 with a 500 ante, 16.67% of big blind
Notice how as the levels increase, the ante becomes a bigger portion of the big blind each time. Here's a look at the NAPT Mohegan Main Event structure around the same levels and how those antes compared to the blinds.
600-1,200 with a 100 ante, 8.33% of big blind
800-1,600 with a 200 ante, 12.5% of big blind
1,000-2,000 with a 200 ante, 10% of big blind
1,200-2,400 with a 200 ante, 8.33% of big blind
1,500-3,000 with a 300 ante, 10% of big blind
You can see that in the Main Event, the antes didn't constantly become a bigger portion of the big blind and that they fluctuated around an average of roughly 9.8% of the big blind. The average of the first five levels of this final table is about 13.8% and it continues to grow.
It will be interesting to see how this affects play as the final table moves on.