Wednesday already

My gosh. Flying along. Lots of time so far this week doing the web-presence thing; now have 223 Twitter followers & 75 'likes' on my Facebook author page. If that is achievement, I'm making progress.
So far 9 copies of Sherlock Holmes & the Zombie Affair have sold this month/week on Amazon Kindle USA. One more and that'll equal the 10 sold in May, though it was live for just 12 days, from the evening on 18th so not a big leap.
Now, all that effort comes down to $7 in actual money earned. The only real justification could possibly lie with future earnings from Stone Song and other writing to come.
Drawback there is the totally different genres - the tiny 'Sherlock' niche as against the much larger and more competitive SF/Thriller/Adventure of Stone Song.
I have no idea how many have read the sample available to be read online fron Amz kindle. That would be useful to know, for sure. Have to assume some percentage of those who read the sample go on to spend $0.99 and buy the rest.
If web presence counts for anything, it should show in a fairly quick start to sales of Stone Song when I publish.
Which is going to be within weeks, certainly, even if I do some rewrites; Jury is out on that. I have a reasonable & coherent story as is. Do I want/need to juice up the tension & conflict?