Replace `[number]` with `%s` using `sprintf()` function.
Old string:
**Good news! MailPoet won’t send emails to your [number] inactive subscribers. This is a standard practice to maintain good deliverability and open rates. But if you want to disable it, you can do so in settings. [link]Read more.[/link]**
New string:
**Good news! MailPoet won’t send emails to your %s inactive subscribers. This is a standard practice to maintain good deliverability and open rates. But if you want to disable it, you can do so in settings. [link]Read more.[/link]**
