I found a TechCrunch article[1], is that what you're referring to? Hadn't heard of these issues before (but also never tried to apply there).
[1] https://www.wired.co.uk/article/revolut-trade-unions-labour-...
[1] https://www.wired.co.uk/article/revolut-trade-unions-labour-...
She did a 30-minute job interview over Google Hangouts with the London-based head of business development, Andrius Biceika, and was immediately told she had passed to the next round, which would involve a small test. “The surprise came when I received the task and it asked me to get the company as many clients as possible, with each one depositing €10 into the app,” says Laura.
The instructions on the exercise said the applicants should recruit at least 200 clients in a week to have a chance at passing to the next interview phase.
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Wow.....
In a developer test you are given a generic problem.
"An analysis of the start and end dates of 147 former Revolut employees on LinkedIn suggests that over 80 percent had lasted less than a year, and over half stayed at the company for less than six months."