I started purchasing them when they first started the GPK ones but then they started coming pretty fast and furiously, and the price per card kept increasing. In addition, the artwork on the past few bunches has been looking less and less GPK-like and rushed, to say it kindly. Since most of these have been based on the presidential political race, themes and jokes have been reused several times. I basically just collect the base sets with GPK releases anyway so it didn't cause any psychological re-alignment to not be a completest with these. I am really glad I am not a MLB card collector. There for awhile Topps was pumping out NOW cards everyday. That had to be getting expensive for a die hard collector.
I started buying the GPK political sets earlier this year - some were pretty funny! I agree, they got to be too frequent, and expensive, and the quality declined. I missed one of the 24 hour sales due to a family emergency, and so I will never have a complete set. Fortunately, I'm not a die-hard GPK collector, and was just buying these as a novelty for what I thought was going to be a strange election season. So, I'm not broken up about it, and now feel quite free to pass on the newer offerings like the one that ends today.
Wackys would be another story - if the only way we will get new Wackys is in this fashion, I would prefer week long offerings so that people don't have to worry that a day off-line might cost them big time on evilbay. And, if they're going to be really expensive per sticker, I might just pass altogether.