No one wants to pay for a PDF if they don’t know who wrote it and what’s in it. Without the filter and imprimatur of a publishing house, we assume the worst.
Once someone knows what’s in it, they probably don’t want to pay for it (why should they, they already know what it says) …
The secret is to write something brilliant, share it far and wide and free, and then wait until you have enough fans to monetize the next one you do.
I’ll make it clear:
**1. write something brilliant
2. share it, for free
3. build a fan base
4. monetize your next book