What the website says:
"Stop losing recipes! Save your favorites to [service] for free!"
What I think:
The privacy policy says explicitly that they will use your information against you aggressively, for profit, and maybe you can delete it but that's it.
Someday it will shut down and take all the saved recipes with it.
In the meantime, there will be all the advertising.
What I do:
copy recipes i like to my own wiki, hosted on my own machine