Wrong:
Both “guides” and WA strings are services that modify the API. They have to be free.
“services related to the addon”…it’s pretty clear, which is why people are ignoring the ToS I linked throughout this thread.
Every single paywall WA, like Fojji, are also violations of ToS. They clearly charge for “premium” content that modifies the API. Blizz just doesn’t equally enforce their ToS…but they should.