30 days?!? That is ridiculous. Where did you find the information so I know where to look next time? I did almost 200 hits for him last week and made a pretty penny, if he'll ever pay me for it.
When you view a HIT, you can see the AA (automatic approval) time. Some requesters pay sooner, others go the full AA.
There is a steep learning curve when it comes to MTurk ... never count the money you 'could' make, only look at the money you have already been paid. This isn't one size fits all and I can only suggest that you read these forums and google any & everything you can about turking. It's real slow at first, but if you stick with it, you can pull in a few extra dollars each month.
The more you put into learning the more you will get out of it at the end
Good luck!