You can, and I have, make your own Memrise courses as well. I'm better at remembering to visit a website than I am at remembering to open a program. It's a silly difference, but I almost always have a browser open and every new tab I open serves as a reminder. I always fail to remember to open/use software. The times I've tried converting to Anki rather than relying that Memrise will continue to be available, my study time per week dropped by about 95%~.