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IMO it would depend on the couple in question. If you don't consider it cheating, then it's not cheating in the context of your relationship. @MilkMe says that following sex workers is cheating to them so in the context of their relationship it would be cheating. Should it be considered cheating? Everyone will have different answers to this, and none of them are inherently right or wrong, it would just (again) depend on the couple in question and what both of them would be comfortable with and what they can compromise on. Just because one person views it as cheating doesn't mean it should inherently be viewed as such on a universal scale, and vice versa, if one person doesn't view it as cheating doesn't mean it should be inherently viewed as such on a universal scale. Essentially it just comes down to your individual relationship--have you had this conversation with your SO? Does your SO know if you are comfortable with them following/keeping up with/paying for internet sex workers' content/correspondences, and where your relationship boundaries are with regards to this matter?
Singapore and Malaysia, two asian countries in Southeast Asia with Chinese as a majority race. No, we can speak for yellowfacing as people with East Asian heritage, but our experience as a majority race in these countries with other people whose features closely resemble our own (and where we don't get discriminated against/made fun of for the shape of our eyes) is obviously going to differ from East Asian people who have been born and grown up in a country where they are a minority, and we cannot speak on behalf of them. We can say "yeah yellowfacing is not offensive to us" but we cannot claim that it's not offensive in general and speak over diasporic asians. In any case, opinion is pretty divided on both sides; there are people here in Asia who agree it's offensive (even if we're not personally offended/hurt), and diasporic Asians who don't thinl it's offensive. But yeah, I agree on the anti-blackness in Asia; we're pretty fucked up on that front.
I made the classic noob mistake of going to go look at these tweets and the replies from stans gave me a headache. Because yeah everyone who does this shit for the ISWV side is totally a KickVic plant, and this story is toooootally made up. 100%. It's too early in the day for a drink. Don't want to end up like Ricketyrackety himself after all.