In the case of Axiom & Vercel, you'll only be paying for ingest (if you need over 2GB/day) and no bandwidth costs. I believe the latter is the case with all of Vercel's observability partners (and with most services providing a log-drains service).

It's a fair point, though...at some point, and with enough TBs of traffic, it could get expensive to provide the log drain support. One thing we've been working on (and more on this in the coming weeks), is putting together a benchmark of log-drain mechanisms to try and work out what would be the most efficient combo of compression/cpu/mem to use for log-drain providers.

Our hope is we can work on making it efficient enough that we can encourage more services to provide log-drains (and therefore allow us to make great experiences around those logs!).