Can we please not gatekeep what counts as a shipfic worthy of equal treatment in a ship community based on standards from purity culture?
a pairing engaging in consensual non-monogamy does not automatically make it a polyfic/multi-pairing fic
a pairing character engaging in casual sex with a third character does not automatically make it a polyfic/multi-pairing fic
a pairing engaging in non-consensual non-monogamy does not automatically make it a polyfic/multi-pairing fic
a pairing character having an additional monogamous sexual relationship does not automatically make it a polyfic/multi-pairing fic
a pairing or character engaging in a bdsm scene with a third character does not automatically make it a polyfic/multi-pairing fic
a character engaging in sex work does not make it a polyfic/multi-pairing fic
Could some of these situations make it a multi-pairing or polyship fic? Yes, they could in the right context, depending on the content of the fic. But does the existence of any sexual interaction with characters outside of the central pairing during the course of the fic, regardless of the context, the fic's relationship focus and endgame pairing, or the percentage of secondary-interaction content automatically stop it from being a "true" shipfic? NO!
Does it mean any fics including such content on-page, regardless of the situation or amount, deserve less opportunity and recognition because "some people might not want to read their OTP having sex with others"? NO!
Please, for the love of fandom, don't let people who can't handle even a glimpse of sex outside of traditional cishet monogamy define what "counts" as a shipfic/polyfic/multi-ship fic. AO3 tags exist for a reason! So does "don't like, don't read"!
Please, community owners/mods, consider the message you are sending about who belongs and what fanworks have value when you make rules and give preferential treatment based on standards of purity culture.