For use in Unity Asset Store sale page dev console

asset-sale.js

(async function get() {
	const publisher_id = 20835;
	const period = 48; //months

	function nextMon(current) {
		let mon = --current[1];
		let year = current[0];

		if (mon < 1) {
			year--;
			mon = 12;
		}

		return [year, mon];
	}

	const now = new Date();
	const from = [now.getFullYear(), now.getMonth() + 1];

	let current = from;

	let tsv = 'Date	Copies Sold	Price	Gross\n';

	for (_ = 0; _ < period; _++) {
		let date = `${current[0] * 100 + current[1]}`;
		const res = await fetch(
			`https://publisher.assetstore.unity3d.com/api/publisher-info/sales/${publisher_id}/${date}.json`
		);

		const data = await res.json();

		data.aaData.forEach(function (entry, index) {
			tsv += `01/${current[1]}/${current[0]}	${entry[2]}	${entry[1]}	${entry[5]}\n`;
		});

		current = nextMon(current);
	}

	console.log('Done!');

	return tsv;
})().then(copy);