- "Interacting with the opposite sex."
"interacting" 「交流」
"with the opposite sex" 「異性と」
- "looking for a partner" 「相手を探す」（恋愛のために）
"partner" の代わりに "boyfriend" 「彼氏」や "girlfriend" 「彼女」もつかえます。
"There are people that like posting their app iDs on here but I'm not interested in interacting with the opposite sex. And there's a lot of people that try to befriend you just to suggest investment scams."
「勝手にここにアプリのIDを載せる人いるけど、異性の交流には私は興味ありません。仲良くなって投資の詐欺を勧める人も多いから」
I see that there is someone who wrote his app's ID here, but I am not interested in relationships with an opposite sex.
Because there are many swindlers who recommend investment frauds after becoming friendly with each other.
ご質問ありがとうございます。
"I see that there is someone who wrote his app's ID here,"＝「ここにアプリのIDを書いた人が誰かいるようだ」
"but I am not interested in relationships with an opposite sex."＝「でも、私は異性交流には興味ありません。」
"Because there are many swindlers who recommend investment frauds"＝「なぜかというと、投資詐欺を勧める詐欺師が多いので」
"after becoming friendly with each other."＝「お互い仲良くなったあとに。」
ご参考に。
オーストラリア 
アメリカ合衆国 
