I always am checking everyday how many downloads I have on my npm packages, so, give a persons username (yourself) on npm, and it will send you an email everyday (at your specified time) with your package stats

const alert = require("downloads-alert");
const config = {
    "username": "mcrowder65",
    "senderEmail": "...",
    "senderPassword": "...",
    "toEmail": "..."
};
alert(config);

I just created a dumb gmail account specifically for these alerts.

Then set a cron job to run once a day, probably at night once npm updates the download counts.