Bonus nTPs for me is a huge deal. My last BAH netted 1600 bonus nTPs as an example. I will be going through Doha as much as possible...
This has meant my annual spend has gone down not up and the bonus nTPs contribute to lifetime thresholds as well.
Obviously it depends on what you care about but I feel the bonus nTP scheme is extremely attractive and softens the spend-based blow quite a bit.