CLEAR interview questions

Interview process was fairly simple, can't go much into details of the interviews because of an NDA. I performed well on the interviews and they scheduled multiple calls and follow ups with me saying that i'd have an official offer coming soon. Then out of the blue got an email saying the position had been filled without ever having received the promised offer. Terrible experience which wasted a lot of my time. Note to CLEAR recruiting: You should respect candidates' time more. Stringing along candidates just to reject them is extremely unprofessional