$4 a month is dirt cheap. People who use this site for free are taking advantage of all the hard work the deckbox team put into it. Ridiculous to whine about it. Work an extra 1/2 hour per month at McDonald's if you need to, but seriously, stop complaining.
In no way discounting what this site can do but the closest comparable solution I can find is deckedbuilder which is a $15 mobile/desktop application which has a working (if flawed) card image recognition engine built into it. That's a very significant price difference.
On a side note I am a brand new (potential) user with professional software development experience. Very excited to see where this solution goes, I am waiting on some privacy questions I asked the "contact" email earlier today before porting over my collection.
Hope everyone is having an excellent new year :-)