win_etw_provider is used at run time in 5 crates (of which 2 optionally). It's used only as a dev dependency in 1 crate.

Depender (with downloads and own rev deps) win_etw_provider version
600 3 win_etw_tracing ^0.1.9
1.1K 1 msft-runtime optional 0.1.*
900 1 msft-service optional 0.1.*
win_etw_logger ^0.1.7
tracing-etw 0.1.*
850 msft dev 0.1.*