But that's the equivalent of flushing money down the toilet. First, you're paying someone to do something that won't see a return. Second, you're passing up the opportunity to have that person work on something that will make you money. Its not like WotC has extra employees doing nothing. If they spend say 20 person hours integrating errata, thats a delay in getting the DDI stuff posted, or the next book to the publisher.
Why update the DDI compendium monthly? Because people buy it monthly, for now.
For those people paying for a year worth there is no new income to support that monthly update to it.
But there is good reason to do so, and likewise updating an existing digital product such as a PDF to include proper and correct rules has that same reason.
Those people who bought it feel better about their purchase and are more likely to make more PDF purchases. Also the people they tell about the PDF updates being constantly up-to-date will be more likely to buy them.
You get the added bonus of having the next printing of a physical book ready in advance for the company when the time comes to make another print run of the book.
Otherwise why update anything in the digital areas, if not updating them all?
You cannot very well update the books already printed and people have already bought, but you CAN the digital ones. Granted this would cause some problems for ONEBOOKSHELF and the PDF sellers under them as they would lose the work done on the bookmarks as they are not included or needed for printing purposes of the physical book and would require doing over for a new PDF. Unless I just haven't found out how to copy bookmarks form one PDF to another, then they just take doing that and make some minor updates to the bookmarks for added pages.
The same can be said for why create 4th edition at all for 2 years when you weren't making any money on it and you could have been making 3rd edition the entire time that was generating revenue.
The reason is the same, speculation. Will the updates make money for the PDFs? Will the book ever be republished and need them? does someone already get paid to make the update PDFs? Why are the errata listed as PDFs rather than HTML or text files?
This doesn't mean that you update each time errata is made, that would have to be decided on how much the errata is and how quick it can be done. But they should all be updated at some point on some schedule, otherwise the PDF will be worthless as there intended purpose to offer a digital, space saving media that is quickly searchable. The DDI Compendium does that and its cheaper. What incentive is there to buy an obsolete PDF file whose content is still being updated with errata, but the PDF does not include in ANY manner any of this errata?
Also the people working on DDI should NOT be the same people working on the PDFs. This is where a problem lies in the system by having too few people work on too many things. It seems to be barely working as the Gleemax cancellation announcement was intended to focus people on things because the focus was lost on making the system work.
Keep focusing more until you get the clear picture of what doesn't work, if that is the case. Should Diedre(sp) be working on DDI or updating PDFs?
Does the DDI team do anything with the printing department? I hope not, as they should be different group working for the same goal, and getting the same materials to publish in their forms of media from James, Mike, Dave, Rob, Andy, Scott, etc*...
*Sorry I don't know every designers name off the top of my head, just put down the ones that popped into mind first, so not intending to leave anyone out on purpose.
So there is a reason if not a few to keep the PDFs updated IF they are what gets sent to the printers for actual book publishing, and WotC does a LOT of actual print material and needs the manpower to get it done and may need more than it has to make sure quality and sanity of the publishing/typesetting/etc teams is maintained.