Hang on, the price to arx ratios are really weird here.
Arx per pound values of the packs:
5k pack: 1672 arx per £
8.4k pack: 1683 with bonus, 1563 without
16.8k pack: 1681 with bonus, 1591 without
25.5k pack: 1701 with bonus, 1614 without
51k pack: 1700 with bonus, 1600 without
85k pack: 1700 with bonus, 1400 without
So the moment these bonuses get cancelled or anything, the best value per money is the 5k pack?
Are you sure, your calculations are correct. I get:
5k pack: 1672 arx per £
8.4k pack: 1768 with bonus, 1683 without
16.8k pack: 1772 with bonus, 1681 without
25.5k pack: 1788 with bonus, 1701 without
51k pack: 1800 with bonus, 1701 without
85k pack: 2000 with bonus, 1700 without
It's the bonus points which should motivate to buy bigger packs. Hence, I think, they are going to stay.
Also, if you stay away from the 49.99 investment with that really nice bonus, the 4.99 one is a nice step up from the 2.99