More than 10 private prompts to every public one is interesting. I expect we’ll see that ratio grow further with the team prompts, at least in terms of most prompts created not being made public. Of course, one of the things that slew/skew the data is that spam and low quality prompts that are made public get found and removed, while low quality private prompts stick around until the user may eventually learn better.
My guess would be close to that, but probably closer to 1:6 or 1:7, given that in addition to spammy or poor quality finished private prompts, there will also be many unfinished, trial and WiP ones too.