Platinum Offer cost much higher than directly buying from store

Recently, I has started an offer 'Chief Almighty' in the double-platinum event. It offers up to 2000+ platinum. The condition of platinum offer is rewards certain amount for each wild girl you get. For the first 4 wild girls, you can level up to get it for free. The amount rewarded for each wild girl is around 50 plat.

But then for 5th-10th wild girl, you have to pay for it. It's fine to have in-app purchase. But 1 wild girl cost USD99.99. From 5th-9th wild girls, for each wild girl, it gives you only 240 platinum. For the last wild girl, it gives you 962 platinum.

1700 platinum in the store cost USD89.99. The store is way cheaper than the offer. (I can get 10000+ platinum in the store for the price I pay for the offer) How come I will pay for it? Would the offer adjust the amount of platinum rewarded (according to the cost?) so that there is more incentive to finish the offer?

When you buy just the platinum in AL you don't get any wild girls tho ;3

Edit: I'm joking, I have no idea what that is, but you get items in both games, so there is some logic in that, I think.

Im not sure what kind of offer you got there but there are/were some that cost more than plat in the store for me too. For example those which offer you food delivery for a month from some company and you get some plats for it. I can imagine some really want to do that offer not only because of the plat but because of the cheap food. However, maybe your offer is one of those too.
Edit: I read it again and seems a bit strange that theres an offer that wants hundreds of dollars for it. The plat for that amount is too low, you are right.

If an offer isn't worth it to you, just don't do it - we don't control the pricing on them beyond the global conversion rate. We would rather you just buy directly anyway. Closing.