That is the case in the USA as well; the comment author was saying that maintaining friendship is considered an example of a received benefit in exchange for a tip. It's an arguable point, but does make some sense (plus arguing with the SEC is...hard!)
also, a side comment:
> But if, you hear rumors from multiple people in your network ...
I think this is pretty clearly not, in and of itself, evidence of insider trading, just an example of trading in a sector you follow closely.
However the first example in the article is one where the two companies had an alliance, and in that case a simple origin like "heard from various people in my network" would not help you. I have been part of an alliance of several large semiconductor manufacturers and ever meeting began with a reiteration of the Hart-Scott-Rodino (HSR) Act criteria and what kinds of topics and conversations were forbidden.