Interesting hoard – I hope that it will be properly evaluated. Concerning the article, I doubt the thesis that a general shortage of silver ore was responsible for introducing bracteates. Scholarship generally assumes that the need for light, distinctive, and easy-to-produce regional coins played the main. The pictures of the hoard are not too clear, but I see coins from Brandenburg, many Silesian types, as well as what might be "Maurice pennies" from Magdeburg. This is interesting in itself, considering that bracteates are typically understood to have been local coinage that usually circulated in and around the places they were struck at. Here is one of my own Magdeburg bracteates: Archbishopric of Magdeburg, bracteate penny, ca. ca. 1270–1280. Obv: St. Maurice, wearing armour, standing facing, holding lance and lance flag; ringlets r. and l.. Rev: negative design (bracteate). 20mm, 0.73g. Ref: Berger 1603–1605; Slg. Bonhoff 719.
What a great find! And a great piece @Orielensis ! I like the look of bracteates though I know nothing about them.