Zap stream basic plan is free though
https://files.sovbit.host/media/11d0b66747887ba9a6d34b23eb31287374b45b1a1b161eac54cb183c53e00ef7/c4ccc7003ed419760016a99709ca7d29afe0ddc445b3d77f1055beb9de8d5efb.webp seems to be stuck on this page even though I've added 500 sats. I've got 5,500 on zap stream...
Discussion
It is! And it's the default setting. BUT atm ZS backend still checks for >0 balance before accepting a stream.