This from the sexypeek terms:

...any image uploaded that is pornographic or offensive in nature (including nudity, violence, sexual acts, or sexually provocative images.)...[snip]...will be immediately deleted and the IP address of the uploaded reported to authorities.

I would not call those terms "adult friendly" but the opposite, and I'd be rather wary to use a service that threatens you will be "reported to authorities" for something they might not like.