One of my publishers
recently sent out a message
to direct all readers
to the publisher site.
Yes, the authors make
more per book sold
on the publisher site
but more importantly,
these readers become THEIR readers.
One of my author buddies
started writing steamier novels
under her usually more mainstream pen name.
Someone objected to this content
and complained to the blog host site.
My author lost her blogging account there,
where she had previously directed
all her readers.
She now has a marketing base of zero.
When possible,
own the site you send your customers to.
Use Facebook, Twitter, LinkedIn
to send customers to YOUR site,
not the other way around.
FillTheFunnel has a great post
on this.