I tried the collection for Chronicles of Mark Johnson https://www.draft2digital.com/book/32117 and despite winning an award, the book sank without trace.
Another aspect which weighs heavily is time Vs income, as shown by "A Sailor's Love," https://www.draft2digital.com/book/34522 I spent over a year writing, editing, re-writing and tweaking, and I am left wondering "Did I write another dud?" Despite many people saying they'll buy it, there has been one sale in three months.
I am not sure I can devote another chunk of time like that, to a book nobody wants. At least Forgestriker is selling.