You mean as a customer? OK you will have a residential ISP. If for example this was ATT then this is also a tier 1 ISP. In the majority of cases it will not be tier 1 though. So lets say your ISP is google fiber, they will have a paid peering agreement with either a tier 1 network or a tier 2 network that has peering with tier 1 etc.

The peering itself wasn't the issue for KF, it's that they shouldn't be interfering with the traffic for other customers. You might have Centurylink/ lumen as your ISP and they may choose to block routing to kf as a residential customer but that block would not usually occur for commercial transit. That was why this was unusual.