Not open source afaik

It’s a large-spotted genet :)

I have a stupid question but what are the costs of a journal like this? I mean, if they don’t pay the researchers and the reviewers, what do they do?

Perhaps it’s because our society values certain professions much more than others, particularly those in the social/educational sector, which are particularly undervalued. IMO, we need to put everything on the table and reconsider what we want to be considered as useful work for society.