So, my count of viable words is yet to be determined.
I track words daily but only publishable words. So if I delete 5,000 words from a story, I end up with a -5,000 word day. Definitely skews my averages. I finally gave up on them. I no longer track any averages at all. It feels pretty good!
By the time I'm done with a book, I can look at my spreadsheet and the number of words I wrote for a book match the number of words in the book. I'm very glad I can't see how many disappeared.
My daily word count spreadsheet keeps tracks of words written per day. If I write 50 words Monday, that gets listed as 50 words written for Monday. If I write 100 words on Tuesday, but delete 50 previously written words, then that gets listed as 50 words written for Tuesday.
Now, if I scrap whole sections, then I base word counts on the new starting word count. For example, if a story has 50,000 words and I delete 10,000 words, I don't record a -10,000. Instead, I use a new word count base of 40,000. Then, I count words added from there. So, in that case, if I end up with 40,050 words at the end of the day, then that gets recorded as 50 words written rather than -9,950. But the overall words written would still be at 50,050.
It's imperfect but it works for meeting my daily word counts.
I also have another spreadsheet that tracks completed works and WIPs with current word count, target word count and words remaining. So, there, if I have a WIP with 50,000 words and then delete 10,000, the current word count gets recorded as 40,000. When a work is published, the current word count becomes the final word count. So, I do have a total of published words.
Sometimes I will have a negative for words remaining because the current word count exceeds the target word count. If a WIP exceeds the target word count, those excess words do not count against my overall target words to be written which keeps my "words to go" count reasonably accurate.
When a book is published, I change the target word count to match the final word count. That way, I can keep a fairly accurate count of how many words to go before my WIPs are complete. At my word daily average, it will take me 21 years to finish all my WIPs.