Easter discounts, no?

No more discounts in here?

Like 10 years content like Curse of Strad, Out of Abyss etc digital form still 25+ dollars?

This should be 9.99 dollars, not more. Or at least in festivities days should be discount....

Hey, I like capitalism as much as the next guy...wait. No. That's not right. I hate it.

But at any rate, I'm not entirely sure why Easter would be the type of holiday where there would be discounts on a TTRPG? 

As for older materials still having a "higher" price: because they are digital and not physical, there's no need to "move inventory" like there would be for physical books in, say, a Barnes and Noble. So the price remains consistent. You can see similar things on digital sales of a lot of video games. The prices stay pretty close to their launch price for the most part.

And on top of that, the digital sale isn't just a PDF for these things. They have magic items, character options, maps, etc that all integrate into the D&D Beyond system, which means anytime the system is changed all of those previous works need to be evaluated to make sure they still function properly with any updates. There are probably other things that add to the digital cost as well, but the fact that you aren't just buying "words on the screen", but instead buying integrated digital assets, keeps the price up beyond what a physical book might be.