[rhn_mk1]

Everyone having an email address is a false assumption, or a bad generalization. There are people among us without one, and owning a phone number instead.

I'm not sure along which lines the divide falls though. Younger? Less western? Less businessy? It's still possible that the people who would be interested in a newsletter are the same people who have email addresses.

[Sharlin]

I used the word "everyone" rhetorically, of course. The point is, to a first (and second) approximation everybody uses email and nobody uses RSS.

[easrng]

If you have a phone number, you probably have an email through a SMS/MMS gateway.

[rhn_mk1]

That's interesting, I have never seen that. Is it customary or well known in your area?

[easrng]

I wouldn't call it well known but almost every carrier I've heard of has one. Check https://www.mfitzp.com/list-of-email-to-sms-gateways/. If your carrier is an MVNO then use one from the underlying provider.

[MrStonedOne]

mathematically its true though.

if 0.999... = 1, then 99.999...% also equals 100%