Starting with this issue, the price of ACTION is now $3.99. Instead of the usual 22 pages of the main story, we were given only 20. Justifiying this price increase is the Captain Atom "Second Feature" (I like to call it a BACKUP), which is a mere 10 pages long. So in reality, I'm paying a dollar extra for the story I buy the book for, only to get two pages less of that same story. Additionally, I'm paying for a story I wouldn't buy on its own.
In spite of all the competition (videogames, DVD, cable TV, the Internet), it's still no wonder nobody buys comics anymore. Prices that historically rise faster than the rate of inflation, combined with asinine editorial decisions, are killing a once-great medium.
So you complain at $3.99, but didn't at $2.99 or $2.50. People have always complained about price increases, then plunked down their hard earned cash. Everything goes up in price over time.
Anyway, in the case of Action Comics, we got a co-feature that ties into the overall New Krypton storyline. DC's been talking about Cap being in the Superman books for a year and the last four months or so, being a co-feature. Also, as DC has been saying for the last several months, the co-features help expose certain characters, allowing them to hopefully get a new title.