Most file hosts (like Rapidgator) offer free unlimited speed during very specific off-peak hours (e.g., 2:00 AM to 6:00 AM UTC). Check the host's policy. Set your downloader to run overnight.
A PLG is a web service or software that acts as an intermediary between a user and a file host. When a user submits a standard (slow) download link from a host like Rapidgator, the PLG server uses its own to fetch the file at high speed and then relays it to the user. This process masks the user’s IP and bypasses waiting times, captchas, and speed limits.