Having only 4 Mbps up and 24 Mbps down, without Freeleech building a buffer would have been impossible, particularly when competing to seed torrents with people with faster internet speeds. In the case of TorrentLeech, the best option is to invest ~2GB of your buffer into downloading and seeding 100 10MB+ torrents, giving you 4 TL points per hour. In combining the gradual point gain with the rewards of the easily attainable TL achievements, after a month you should be able to accumulate 5000 points, enough to purchase 100GB of additional buffer from the TL marketplace.