How often should I promote to my email list?

My general recommendation is:

About once a month.

But that's not a rule.

You could promote every second month.

Once a quarter.

Or use whatever frequency that makes sense for your business.

The more important question is how you're doing it.

Because promoting once a month isn't inherently annoying.

Promoting badly once a month can be, though.

If every few weeks your subscribers suddenly get hammered with increasingly desperate emails, manufactured urgency and:

"HEY {{ first_name }}, JUST CHECKING YOU SAW THIS!!!"

then yes, eventually you're going to burn through people's attention.

But a well-run promotion can be different.

You can tell people what you're selling, explain why they might want it, give them enough information to make a decision and, importantly, respect the people who aren't interested.

That's why I don't think there's a universal answer like:

"Never sell more than four times a year."

You have a business.

You're allowed to sell things.

I generally like monthly promotions because they give you regular opportunities to generate revenue without making every newsletter a sales email.

The goal isn't to avoid selling.

It's to sell in a way that means people still want your emails afterwards.