Quoted from ryanwanger:

Sorry about that, you're misunderstanding. We always do 49 cents per bulb on the 2SMDs for Black Friday when sold in 25 packs (so $12.25 for a 25 pack). Then, we also list the 100 packs at $49.00 (also 49 cents per bulb). There is no *additional* discount for going to 100 during the sale. The per bulb pricing is the same if you buy in denominations of 25 or 100. It has been this way for at least the last three years.
The confusion is just that I was over-explaining some stuff in a previous post. What I meant was that during the sale, there is no reason for us to have a "buy discounted 100 packs" button, since the pricing will be equivalent.
Edit: I edited the wording of my previous post to hopefully make it more clear.

People *love* these bulbs. They were on sale last year, so they won't be this year as we try to mix it up with the specialty bulbs. I think the most commonly used spots for these are for flames/fires/ship exahust in backboxes, and occasionally in the GI for particular features. (I don't use much color in the GI of my personal games, but I have a fire bulb or two in the volcano of my Congo).