Delighted to see you charge in!
About 1000 items in Top Ups #1 to #4 are from the 2014 AQA GCSE syllabus, and I used the EllieGrigis Memrise course as an easy way to harvest the vocabulary. I ended up being a contributor because I volunteered, ~4 yrs ago, to fix a few dozen errors I noticed in her course and, later, I added audio.
The only Memrise Spanish courses more popular than this one are a couple of the official courses. The course currently gets about 100 new subscribers each weekday, but a lot fewer at weekends for some reason. By some strange coincidence the course, right now, has exactly 77,777 subscribers.
Recently, I’ve been working through the AQA A-Level Dynamic Spanish course by JJ_or_Jemima and I’m also using the Hodder textbook (along with online answers). I estimate that that course contains ~1200 items that are not in the xoviat 5000 course or my Top Ups #1 through #10. Her other A-level course is about half the size of the Dynamic course, and contains only the textbook end-of-chapter vocab lists.