Likewise, the traditional publishers often respond to demands by funders to make research available by e.g. allowing researchers to share their work elsewhere, and often only after a year or so after publication [0]. This makes the barrier to do so higher, and makes the research less findable. It's not odd to expect that when initiatives like Unpaywall [1] make that research more discoverable, things like embargo periods will get worse.
[0] https://medium.com/flockademic/how-open-can-open-access-be-c...
[1] https://unpaywall.org/