Yes my subscriptions are mostly social media management such as Hootsuite (and a couple of others), client website hosting space..and some creative stuff like Photoshop Creative Cloud, some additional Dropbox and Google Drive, 17 Hats and that's about it. Oh and internet too. Of course!
So, 17Hats IS on the whole good value for money, and is super efficient...tidy and functions well. I don't really gain from telling you about it, maybe a month free if you use it but then I pay for 2 years at a time so makes no odds. There's an automated email function, so you can create lead capture forms and embed them on FB page, in an email or on a webpage. Then follow up with a thankyou message and further emails on auto. You can also point a URL to the lead capture link directly and advertise just that. The customer service team are helpful and have an online chat facility for tech support.
The email set up is good too...permits the use of image links to add a tidy signature. Attractive questionnaires that can be branded with logo and colour scheme. Work cycles, payment processing via Stripe or PayPal. Invoicing system which you can set up as you please: VAT/repeat/discounts. You can also set up invoicing to auto deliver monthly if you collect monthly subscriptions via another payment platform such a Go Cardless or PayPal subscription. Unfortunately 17 Hats only processes one off payments, which for me is a pain as some of my clients are on monthly retainer plans...but I find a workaround no problem.
One more point...if you have 2 or 3 different services you can operate them as multiple brands at no extra cost with different logins, branding and payment processing. Useful if you receive different currencies for example.
I'd be happy to talk you through...over a Skype call or something. Or alternatively you can just take out their 30 day free trial and give it a go. I love it. Been using it for about 3 years...and am into my second 2 year plan. Costs around $250 for the 2 years I believe. Buttons IMHO.