I fail to see the problem with the abacus. I saw the video in the news and thought it was a wonderful idea for an enrichment item. It's colouful, it moves, and the monkey seemed genuinely happy and excited to fiddle with it.
Nobody in his right mind would think monkeys and apes are trained to do calculations!
What I am really concerned about is the periodical rerun of old advertisements featuring primates, snippets of the old chimp teaparties, etc.
This sets definitely the wrong signal for a great number of uninformed people.