On occasion, if you are an important enough customer, they'll give you peering for free - https://www.xfinity.com/peering . But they'd rather sell you Paid Peering (for obvious reasons)
Generally speaking ISPs don't pay anything for peering. (Unless they are smaller/local ISPs/WISPs or similar, who have to purchase backhaul or upstream to be able to offer service.)
https://qz.com/256586/the-inside-story-of-how-netflix-came-t...
https://www.comcasttechnologysolutions.com/our-portfolio/who...
On occasion, if you are an important enough customer, they'll give you peering for free - https://www.xfinity.com/peering . But they'd rather sell you Paid Peering (for obvious reasons)
Generally speaking ISPs don't pay anything for peering. (Unless they are smaller/local ISPs/WISPs or similar, who have to purchase backhaul or upstream to be able to offer service.)