[tinylittlefish]

I'm the guy who runs Two Dollar Tuesday (I'm also a Mac App Developer):

A few reasons why you wouldn't necessarily do it every day:

At $1.99, he would have to sell more than twice as many copies as he is selling now to make the same revenue. Plus, he'd have more support requests to deal with. $1.99 may not be the optimal price point.

The reason to participate in any "bundle" like Two Dollar Tuesday:

- Mailing list: TDT has a mailing list of thousands of Mac users who've asked to receive the deals each Tuesday. We have a phenomenal open rate (last week was over 80%). MacUpdate, MacZot, etc., all have the same kind of thing going. Thousands of Mac users eager for discounted apps.

- Cross promotion. Someone looking for a discount on a different app might discover your app through TDT.

- The "limited-time effect" -- people are more likely to pay $1.99 for something if they know they only get one day to get it at that price. Were the price always at $1.99, you lose the sale/impulse buy effect.