It’s not hard to figure out that Cerebral Accelerators expire, but when you purchase on the market, EVE lists them as current, whilst there is a hidden expiration date that you can only read once you 've wasted the ISK and tried to use it.
This is like Amazon sending you a cardboard cutout of a TV instead of a TV. Can’t blame players for continuing to take advantage of the scam but the EVE market system needs integrity.
You generally can’t list expired items for sale on the market, but items listed on the market that expire after they are listed remain on the market in an expired state. This seems like a reasonable way to handle things because having the server purge expired items from the market seems like a lot of hassle for very little benefit.