You need to make sure that the people want to receive it.
I got a couple text messages from something publishing related, from some self-publishing courses. I'm not sure what it was, if it was something I bought, or if I just opted in to download a pdf, it was a long time ago. I don't remember. Anyway, I never, ever, ever, gave anyone authorization to text me.
First time I got it I replied with &^&^%#^2 REMOVE ME FROM LIST.
A couple months ago, I got a text again. I'm screaming at my phone because I can't mark it as spam. Again I asked to be removed. I hope it works. I don't know, if it happens again I'll see what I can do about it.
Cause an email I can open when I want. I don't get notifications on my phone. It won't interrupt me. I only get text messages from people I know, and they are the only notifications I get. I don't have notifications for anything else.
So my opinion is that it's annoying, and I really want to punch the people in that company who've sent me two text messages. Being interrupted by a text message to realize it's some junk is infuriating beyond measure.

That said... if people are crazy enough to opt in for that... Fine, I guess. Some people get tons of notifications on their phones. I still find that text is personal, it's almost like calling me, and I don't like it.