bugfixes and improvements

lib/services/listings/listingActiveTester.js

@@ -17,16 +17,16 @@ const userAgents = [
 ];
 
 /**
- * Check if a listing is still active with up to 5 attempts and exponential backoff.
+ * Check if a listing is still active with up to `maxAttempts` attempts and exponential backoff.
  * Backoff waits are randomized and capped.
  *
  * Rules:
  * - HTTP 200 => return 1 (if checkForText is provided and found, returns 0)
  * - HTTP 401/403 => return -1 (most certainly detected as a bot)
- * - HTTP 404 => return 0
+ * - HTTP 404/410 => return 0
  * - Other statuses or network errors => retry until attempts are exhausted
  *
- * @returns {Promise<Integer>} 1 if active, 0 if not active and -1 if detected as bot
+ * @returns {Promise<number>} 1 if active, 0 if not active and -1 if detected as bot
  */
 export default async function checkIfListingIsActive(link, checkForText = null) {
   await sleep(randomBetween(50, 100));