What happens if your Stripe account gets shut down?
What happens if your merchant account gets frozen or shut down?
What happens if you reach your monthly subscription limit on your merchant account?
I've heard HL is going to integrate eventually with Authorize.net, which would be great to have another option other than just Stripe, HOWEVER... Authorize.net doesn't give you the ability to rotate between merchant accounts. NMI is a much better payment gateway.
We've been running our agency for 8 years and the reason we prefer NMI over Authorize.net is it gives you the ability to rotate merchant accounts.
We have three merchant accounts and NMI automatically rotates our monthly client charges between those three.