I tried using the double-tilde syntax, which as far as I can tell is enabled in Remarkable. Even when inserted by Remarkable's own Strikethrough button, it is not rendered in the preview, nor correctly tagged in the HTML export.
Version 1.62 running on Fedora Twenty One, KDE spin, kernel 4.1.6-100.fc21.x86_64.
I tried using the double-tilde syntax, which as far as I can tell is enabled in Remarkable. Even when inserted by Remarkable's own Strikethrough button, it is not rendered in the preview, nor correctly tagged in the HTML export.
Version 1.62 running on Fedora Twenty One, KDE spin, kernel 4.1.6-100.fc21.x86_64.