Looking for “deals” is in human nature. It does not necessarily mean greed. I know I can not afford products of some developers in RW circle.
Deals are not a threat to all developers. Most of them routinely offer deals from time to time, or bundle their apps for a discount. They are not forced to do that, but they earn our gratitude.
Even shops selling Apple products sometimes provide deals – usually for a very short period of time.
So, why not compile the news about deals to make them more accessible for those who need them?
BTW, you are free to buy apps at their regular price, whenever they are not discounted. I do that too, sometimes. The fact that some addons are on sale does not necessarily mean that I go and buy them whether or not I need them. I am even known for buying apps for regular prices, even though I know I will never use them – just to support developers.