Yeah, a hybrid advertising/micropayments-to-eliminate-advertising model is rad. That's the model of the blog service I use and I pay for the ad removal.
I know that some strips use micropayments or small subscription services for direct add-ons to the free strips... colourized versions, additional commentary, rough draft stuff, small animations tangental to the art of in the art, audio files of the dialogue, etc etc etc... and that's basically cool with me. I'd pay for something like that on a strip that I really dig as I do Achewood at its best.
What's galling with Achewood's subscription service is... I mean... Christ, it was an incredibly irregular strip to begin with. It didn't have a set schedule, sometimes it only had one actual comic a week, sometimes less. With Achewood in particular, the "additional material" like the character blogs and such... it wasn't really "additional material"... it was often the replacement for an incredibly erratic strip. The lunch WAS the meal, as the Buddhists wouldn't say, you know.
And so now that those other parts of Achewood that filled in for actual strips are... "premium content"... and yet the actual strips are even more erratic?
It swallows down hard to be told that the stuff that used to fulfill the continuance of a sparsely-updated strip is now paid material AND the strips are even less frequent.
Achewood may well be an extreme example of the "premium content" model, though.
Perhaps if you're talking about a strip that has always been strictly and reliably two or three times a week and has never used other forms to replace those comics, paying extra for that kind of material isn't as infuriating and crazy.