Sending more than 20 requests per 24 hours (reset is midnight Pacific time) will clog them up and make them take longer to get to your nbrs. Anything over 20 gets kicked to the next day, 20 more, the day after that, and so on, and each day's 20 ends up being chosen randomly when so many are picked. Sending over 100 like that, it'll take several days for all of them to finally get out. Hold off on requests completely for a few days (from your post date, or starting now if you've sent more since then), and let them clear out before sending more, then just stick with 20 that you know will respond. :-)