The VIP store appears to have a visual glitch for these speedup offers.
For example, one offer says "5m x9 for 500 crowns" yet when you click the offer's "?" it shows "6h" which means maybe it's "6h x9" instead of "5m x9"? Likely.
Surely this is the case, as there's also a "5m x 20 for 2000 crowns" (LOL) yet the "?" shows 12h", which would be reasonable (not great, nor good for a "VIP", but the number would make sense).