Why making academic research free is complicated - Vox

"Freeing research largely paid for by taxpayer money can seem like a no-brainer, but over time, the potential downsides of open science efforts like the Plan S mandate have become more apparent. While pay-to-publish but free-to-read platforms bring more research to the public, they can add barriers for researchers and worsen some existing inequalities in academia. Scientific publishing will remain a for-profit industry and a highly lucrative one for publishers. Shifting the fees onto authors doesn’t change this.

Many of the newly founded open-access journals drop the fees entirely, but even if they’re not trying to make a profit, they still need to cover their operating costs. They fall back on ad revenue, individual donations or philanthropic grants, corporate sponsorship, and even crowdfunding.

But open-access platforms often lack the prestige of well-known top journals like Nature. Scientists early in their careers — as well as those at less wealthy universities in low-income countries — often rely on precarious, short-term grant funding to carry out their research. Their career depends on putting out an impressive publication record, which is already an uphill battle...."