Quick Question – Postcards

I’ve been designing postcards for every book release and mailing them out (if you want to sign up to receive these, you can do that here) — I’d planned to send Riveted‘s next, but I just realized that I actually have a release before that for the epilogue novella in August. For the past novellas in anthologies, I’ve just included it on the back of the postcard even though the novella’s release might come a month before/later than the other release, like so:

So my question is: If you are receiving the postcards, would you prefer to receive a separate reminder for the novella releases? Or do you prefer to receive fewer postcards?

I don’t want to spam anyone’s mailbox — but at the same time, readers are signing up for these postcards so they get a reminder when I have a new release. So I’m not sure where the happy medium is when I have a novella coming out.