The article gives a really nice perspective on how morally questionable this is.
The company gets cheap, Finnish-speaking workers, while the prison system can offer inmates employment that, [the company] says, prepares them for the digital world of work after their release.
Yeah sure, doing more data labelling? I highly doubt data labelling gives anyone any skill besides date labelling. Luckily this article doesn't just accept the statement of the company, but questions it very critically.