Before we begin: Not sure if anyone has already suggested this -- I tried sorting through the suggestions with CTRL+F, but lag was killing me and there are 40 pages. It would help me out if you'd tell me if this is already a suggestion!
Also, if this is in the wrong category, tell me and I'll get it moved -- wasn't sure whether I should put it in existing features or convenience.

Suggestion:
I am in no way suggesting that the prices of GB change, in fact I'm pretty happy with them -- but there should be a small addition to the way they're sold. I'm proposing that there should be a lower purchase tier than $10, perhaps $5 for 10 GB (the ratio is for every $10, 20 GB are sold -- therefore, halve $10 and 20 GB, and boom, $5 and 10 GB).

In the oasis, the lowest purchase you can make is $10 for 20 GB -- many popular features in the oasis sell for 10 SB, which is already half of a 10 dollar purchase if someone decides to buy such a feature, which isn't too convenient.

On top of being convenient, it would be beneficial too. Because so many features in the oasis cost 10$ (tigers eye, cub stages, king retirement, custom decor), it would seem appealing to shell out 5 bucks to get something, rather than paying more than you need. It's a way to fool people (welcome to business) into buying more in game currency than they would with just the $10 base price, since $5 isn't very much.
Yet again, this isn't altering a price, it's just providing more purchasing options to make buying GB more accessible, enticing even.

If you agree, go ahead and support -- if you don't, then you can tell me why too! Never suggested anything, so I'll see how this goes ^w^