The issue here is really if this mailing list is the
appropriate place
to advertise commercial and non-free products.
My answer to that one:
"Nope."
Because:
* This list is mainly populated by experts.
* Advertising is only effective with non-experts
* Advertising tends to disproportionately annoy experts
-> Lose-Lose situation.
Alternatives: Google SEO -> Own mailing list/fan club
Carlo