One job that told me I'd get a beginning hourly wage, and then a raise after passing a training and evaluation at the end of my second week. Didn't get that raise after working there for 4 months.
Another job that hired me part-time as an educational assistant, and then fired the educator I was assisting and the website/server maintainer, then told me I'd fill both of their roles while also designing new courses and building demo robots. They strung me along for months, offering me a full-time position, all the while having me log my 60-hour timesheets internally, but signing off on falsified 20-hour timesheets. Finally, I was told to write the job description for a new full-time position that was tailored for me, so they could "quickly" fit me into that position. Then, they immediately hired someone else without even interviewing me. Through a number of monumental fuck-ups on their end, I was able to make a strong case to the Texas Workforce Commission stating that I was wrongfully terminated and in a hostile work environment, for which the employer had to pay me every single unpaid hour.