The app is for watching movies. there are lots of movies that are legal to distribute this way for anybody. And people could have rights to copy specific films from other routes. Copyright terms (if they exist) vary by jurisdiction, some countries have eg 25 years from date of production for movies.
Also, the benefits of tit for tat sharing to prevent Leachers are also less important - with more people having faster internet, there isnt anymore the "everyone wants to download far more than they can be bothered to upload" issue.
> there isnt anymore the "everyone wants to download far more than they can be bothered to upload" issue.
There’s the “people quit their BT client as soon as they finish their download” problem which faster internet doesn’t solve.
If the sending client prioritizes data to clients requesting rare blocks, that problem is solved. It will also give clients an incentive to download the rarest blocks first to keep the swarm healthy.
But for BT I just set up a secondary on-demand network interface on my Linux server specifically for OpenVPN (just need a shell script to add a couple ip(8) rules, and stick that shell script into the up command of ovpn config). Then I bind my transmission-daemon to that specific interface (bind-address-ipv4 option). This way all BT traffic goes through OpenVPN, but other traffic is not affected. Works for any OpenVPN provider.
Some VPN companies also provide apps with the feature built-in.