Before the 0.1x cards vanished players could have ended on any multiplier ending in 0.0 through 0.9.
Now, unless the player was aligned with 0.0 or 0.5 when the 0.1x cards were replaced with 0.25x cards, they are stuck in a state where they can never again achieve "evenness" in their multiplier. This leaves folks that are super anal about things like this twitching slightly. (What? Maybe I'm not talking about me. -twitch-)
I propose the following (sorry to the upgrade card appearance rule coders) somewhat evil cards, with the restriction that to have one appear at all you must be on one of these weird numbers, to correct this for me, er, the people that this is driving crazy. Once a single one has been applied, none will ever be needed again as the player will have been corrected.
0.0, 0.25, 0.5, or 0.75 - No fix needed, these line up with the new 0.25x cards perfectly.
0.1, 0.6, 0.35, or 0.85 - a 0.15x card for 7,500 iMg would correct this.
0.2, 0.7, 0.45, or 0.95 - a 0.05x card for 2,500 iMg would correct this.
0.3, 0.8, 0.55, or 0.05 - a 0.20x card for 10,000 iMg would correct this.
0.4, 0.9, 0.65, or 0.15 - a 0.10x card for 5,000 iMg would correct this.
In my particular case, as an example, but maybe we're not talking about me, I have a multiplier of 31.35x which could easily be repaired with a 0.15x card.