Great card! As a seeker, it rewards you for doing your job! Fast action is cool and it's a card for team players, you can fund your team on a high-shroud location. You could even replay it with Eidetic Memory I could see it very well in a Minh deck, she's always been a team player. But it's cool for a lot of investigators, Roland for exemple would welcome the extra cash. A great card indeed!
Solid card. Have tried it in Joe and would recommend not putting it in the insight deck however. It doesn't benefit from the discount and it doesn't help you clear the clues thenlmselves, much better kept in hand so that he can use his other tricks to clear clues and then follow up with this as soon as possible.
The best thing about the card is that in solo it's always a good play regardless of the Shroud value, even 1 extra credit is an action saved and it scales from there. Since he's able to break Shroud 3-4 without breaking a sweat though this is a definite replacement for Emergency Chache in his decks.
Crack the Case is econ in a faction that until recently didn't really have resource issues (Namely, paying for slightly more expensive assets, that don't immediately pay for themselves like Dr. Milan Christopher does, Fingerprint Kit and Mr. "Rook").
The freedom from needing actions to get the money, the potential for 4 resources, it's a great supplement to Emergency Cache, the requirements to trigger it however don't make it quite effective enough to be a replacement for Emergency Cache unless youre playing a baseline 5 character. Crack the Case is just as easily played round 2 as it is round 20, having methods to quickly turn the extra money into test success, for example via talents, is smart. On the flipside Crack the Case can really speed up the rate at which your friends get stuff like Rite of Seeking or Agency Backup into play.
Space in a deck might be a bit too tight to actually fit Crack the Case, off-class characters however.. Roland Banks loves it! This is actually a good reason (the best reason?) to bring Crack the Case, as a means to fund your team some resources, it's certainly more straightforward then using Charles.
Note that the card can activate even if you aren't the investigator doing the clue deed, a nice bit of flexibility.