Definitely both, potentially with one driving the other. While Twitter has always had an inclination towards quippy hot takes and similar, in its transformation into X it's taken a hard turn towards junk politically-slanted engagement bait above all else[0]. Content with any semblance of substance or nuance and especially anything misaligned with controlling interests gets buried.
The EFF is at odds with both facets of the current US administration as well as the big corporate donors in its pockets and its posts deal with nuanced topics, and so naturally its posts are among those not surfaced as often.