your question is a bit hard to understand. Why should one use “bulk add” for adding a word or two?
With bulk add you can whatever you wish as many times you wish (I am not using bulk, I add items one by one usually). (VERY) unfortunately memrise does not have an algorithm for identifying duplicates in a course.
If you make a course like that and gain very many points in a short time, Memrise will likely investigate. They feel like they need to limit cheaters.
I don’t know if it is possible to remain undetected, but a good strategy would be not to get more than 50,000 points an hour, and not for 24 hours a day. There are some no-typing courses where this is possible. You get more points on mobile.
So the best way to cheat would be to find a no-typing course that is very easy for you (say English > your own language), and do it on your phone. Then spend a few hours a day learning that. Don’t get more than say 3 million points a week or Memrise (and other users) may think you are cheating.
If Memrise thinks you are cheating they may delete your account or delete your points.
Or just…don’t cheat? It cheapens the experience for people who care about points and try to earn them fairly. I guarantee there are better ways to spend your time. Play a game that’s actually fun/engaging, or use Memrise for its intended purpose: to learn!
Besides, attaining overlord would take an obscene amount of time, even with cheating. I’ve been using Memrise for two years, and I’m not even halfway there! xD