Specifically about the daily prompts: I love them. Truly. I think there's a solid variety, and I have written more than a handful of poems at their behest.
I know my own engagement has been lower with them lately, but when I am working on my own unprompted work, that generally takes all of my creative focus. I would still absolutely write for one if it resonated, or if I was in a slump or just having fun, though.
I wouldn't let temporary lower engagement bring you down. It's a fun program!