They are making money from website traffic and not directly from the add-on, so it's not explicitly against the tos.
Paying money for addon is a violation of ELUA. According to Blizzard all addons should be free of charge and they only legal was to endorse ...
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Addons are not allowed to charge for the addon download. A few addons get around this by charging for the content and not the addon (typically ...
The addon works without the streamer's settings. The addon developer itself is not restricting anything to you on a paywall. The streamer is ...
Literally this, they can't stop you from sharing the guide files because that requires them to take action against people that don't pay for the ...
To the clowns saying "the addon is free, but the paid guide is not part of the addon, so it's not against the ToS" you cannot be any more wrong.
You can never and will never convince an entire community of addon users that the line for morality in terms of cheating/convenience features ...
It's not against the rules to boost someone and getting gold in return, however they do not condone the act of "advertising" it within the chat.
It's illegal in most EU countries. The thing is, it is easy to circumvent. For instance it is not legal to fully automate banning - ie. a human ...