Google Translation:

Online torrent download flow control

In a short period of time, a large number of torrent downloads will trigger the flow control restriction (only for the torrent download behavior, for the torrents that have been downloaded, the task will not be triggered). After being restricted by the flow control, you will be prompted: out of limit! And you won't be able to download any torrent for some time in the future.
Exception: releasers are not subject to this restriction for downloading their own torrents, or for torrents in seed conservation and cutting off areas (if any).
If you use IYUU supplementary seeding, please refer to the relevant flow control instructions and settings (the site has communicated with the developer, and IYUU will adapt to this site later). It is recommended that no more than 15 torrents may be seeded each time.

Update:

Current flow control settings: 30 torrents/hour, VIP and above 50 torrents/hour, cycle monitoring.
About IYUU, it is recommended that no more than 20 torrents per supplementary seeding.