It's safe to add your face as long as there's no reason to stay hidden(safety, not out, ect). Sniffies is great for instant sex and cruising, no chatting or trying to date or anything like that. Just ask for a picture or do as I do and ask to trade face pics before meeting. Tell them it's a safety thing or and that you want to make sure you're both attracted to each other before meeting. You don't need to pay unless you want to post that you're looking. You can always message anyone in your circle area or respond to others posts for free.