petersuber<p>Update. Extra kudos to <a href="https://fediscience.org/tags/Zygon" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Zygon</span></a> for flipping from subscription-based non-OA to <a href="https://fediscience.org/tags/DiamondOA" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>DiamondOA</span></a>. Based on the cases I've seen (i.e. anecdotally), I'd say that most subscription journals that flip to OA flip to <a href="https://fediscience.org/tags/APC" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>APC</span></a>-based OA. They do that either because it's the only OA model they know about (depressingly common) or because it seems to be more lucrative and less risky.</p><p>Has anyone seen data on this? What % of subscription journals flipping to OA flip to APC-based OA and what % to diamond OA?</p>