Freemium
Self Published e-books currently has strong connotations that the self-publishing author intends to make money off their work at some point in time.
Partly this connotation is driven by the fact that the best avenues to put self published e-books before the worldwide public (such as Amazon) are all themselves profit-seeking and distributing permanently free e-books will only lose them money rather than make them money.
So they simply won't distribute* self-published work that remains permanently free-to-read.
