Twilio Customer Service Representative interview questions

I applied online and received a email stating that a recruiter would contact me for an initial call. The call with the recruiter was about 30min, and went over my history, typical call. State next she would set a call with team lead. Never heard from her again. Received email stating went with other candidates. Weird application question - sexual orientation? - Not sure why they needed to know my sexual orientation. Are they giving preferential treatment? Are they discriminating against one over others?

Multi-step process, approximately four rounds total with the final in person interview round being about five hours long. The first few were application screening, take home tests, interview pair/coding, and then five interviews in a back to back block.