I agree, I'd suggest with Terms & Conditions there are: 1) people who don't read/skim them (the majority) 2) people who want all the details (a vocal minority)

I agree, I'd suggest with Terms & Conditions there are: 1) people who don't read/skim them (the majority) 2) people who want all the details (a vocal minority) So if your T&C's state something like 'we may send puzzle data to our server, where it might be stored' & you also have an FAQ on your website with the full details that should satisfy both.