I answered in the shipping thread, but I'll answer here too... a little bit more in depth.
I tried Cratejoy last year (one of the "growth" efforts I made last year that put me in the hole). I had crickets. Nothing. Not a single sale. Of course that was just doing soap, maybe if I trusted in myself to be able to do a more varied box offering - such as a soap, scrub and lip balm - it might have sold. But then again, it might not have.
I offer a subscription service on my own website, The Soap of the Month Club, that has done really well for 2-ish years now. I think I started it December 2016. I used to offer it year round and make extra soap for each month for add-ins, but just changed it so that I only offer it at specific times of the year so that I can better control planning and making the soaps, as well as managing customers (remembering to remind customers that this was their last month was a huge failure on my part). So now everyone ends on the same month, when I reopen the subscription, they'll get the reminder as well. I was scared that I was going to lose sales doing it that way, but when I went back to review the subscriptions, the "drop-ins" were actually predictably in line with Christmas season so I coordinated my signup times with that in mind. Sorry, this might be way more than you wanted to know, but I love my club soaps. They're fun, quirky soaps that are different than soaps I carry in my regular lineup. I do include a letter with each soap - just a quick blurb on half a sheet of paper that says a little bit about what's going on in my life, I talk about the soap design, why I chose it for that month, and then close with a teaser at what's coming next month. I had one customer who got the soap as a gift from one of my regular club members, but it was too much soap for her to use a full bar in one month (seriously, I question how often she showers because she hasn't been in the club for a year now and still emails me "I just started using this soap and I love it") but she loved the letters so much she asked me if I could continue to send her the letters every month! She's lucky that her daughter is one of my favorite customers 'cuz I send her an endcut with her letter too, lol. [Just so you don't think I'm crazy for doing this, every time her daughter orders from me, she orders $50-75 and I have the tip function open on my shopping cart so she'll tip me $10-15 on top of that... so I think her daughter has paid for this small gift 1000x over.] And there it is. WAAAAAYYYY more than you wanted to know. Sorry. work is non-existent today, my office mates are all traveling, so I'm lonely... bored lonely Sherry = Chatty Kathy