Most of those categories are from financial institutions or card networks. Stripe has been working with them so we can support more businesses, and I know of quite a few networking equipment businesses that run on Stripe today. If you're still seeing any trouble, we'd love to take another look—our support team's at support@stripe.com (and my email's edwin@stripe.com).
Support told me that our business could not continue to use Stripe 2 years ago, we've been with Payment.ninja since (and pay a little under half what we used to pay Stripe).
I took what Stripe Support told us very literally, and we ceased using DigitalOcean and one other service since their only recurring billing options were Stripe.
We don't want to break Stripes ToS or do wrong by our clients, hence our contract-less, B2B only, monthly prepaid business model. Apparently this is too high risk for your company?
I'm 90% certain Stripe has had a few fly by night calling card companies sign up with them, and gotten burned when the calling card company gets a ton of chargebacks for not delivering everything promised.
Thus, a blanket ban on Telecom and anything vaugely related (like ISPs). Certain flagship clients like Twilio get a pass, but smaller players like SignalWire, Telnyx, Teli, etc do not.
