The return mechanism has been tested on the site. If there are no malicious bugs in the future, the return range will be gradually expanded.

Return is essentially a type of promotion, which can be searched in the search box. It conflicts with download coupons and cannot be used, so there is no return of download coupons.
Return is also a state. When the seed state is "download seed" when it is returned, the return mechanism can be triggered. Note that downloading seeds here is the download action, that is, the act of downloading seed files.
The upper limit of the return is the volume of a single seed. If it is downloaded multiple times during the return promotion period, only the download volume of a single seed volume will be returned at most.

Currently, there is only one type of return, 3DFree
3DFree: If a seed is a promotion of 3DFree, and the promotion period is five days, it means that anyone (including the box) who downloads the seed within these five days will trigger the return of 3DFree. The download volume will be counted when downloading. If you do seeding for 3 days within 15 days, the statistical download volume can be returned in stages (the actual download volume is still calculated). After 5 days, the seed status may change to normal black seed or other status (you may want to look forward to 3D50%).
In layman's terms, all black seed downloads are counted during downloading. In the next 15 days, as long as you do seeding for 3 days, the system will slowly deduct the download volume of your seed.

In the future, XDFree may be launched for old seeds (X is the number of days, which has not yet been determined), so that everyone can download old seeds more safely without increasing the download volume.

The current range of 3DFree is
100G+ cmctv collection
Original original disk