Smart Mimic interview questions

TL;DR Unprofessionals I applied the job via LinkedIn. They emailed me after 3 weeks for the first interview. We talked about my experiences and their plans for the future. Afterwards I emailed them a bug report about their app. 4 days later, on a Tuesday, no questions asked without any communication about if I'm available or not. They directly invited me to a technical interview on Friday of the same week, at 9 p.m. I want to repeat that part for future candidates; sending someone a calendar invitation without any confirmation for a Friday 9p.m. technical interview. I simply rejected and asked for their salary range in order to prioritize them on my calendar. They responded to me after 6 days saying they couldn't share due to company policies. It was a perfect waste of time with unprofessional people.