>>tomrod+Yc
They allow you to download Torrents and seed them on your behalf. Now of course, you might just be seeding Linux ISOs, but we both know that is probably not what 99.9% of their customers intend to do.
>>sva_+Qv
The downloaded files are technically sitting on Amazon's server (IIRC). Put.io doesn't know an illegal file is there (it's encrypted), so how would any one else?
>>mbesto+ML
By seeding a copyrighted file, someone could get Amazons IP address, who would in turn know the data was hosted by Put.io? I doubt they could get out of DMCA that easily.