Did it look the same? There is a offer that shows up when a new world is created (some restrictions apply to prevent abuse) that has a different visual look to itI got a similar offer but mine was for 50 daily diamonds and the prices were $9.99 $24.99 and $39.99 respectively. Maybe mine are less because I am still in IA.
Are those prices in USD?
Inno uses some kind of automated (I believe) system to make the offers. Likely the difference is based on past spending habits of the players involved. If you haven't bought a diamond package or only a small one they'll offer you a deal that costs less as they may figure you are less likely to go from spending $0 dollars or $20 (or whatever amount) to say $99.99 (the smallest amount shown in the deal posted above).