If a merchant gets a lot of charge backs from a specific card issuer or acquirer, they can block them specifically. A company at Netlifx's size could be doing this, but I've heard specific instances of it happening with grocery stores, gas stations and convenience stores.

It's very common for neobanks to have a high rates of fraud, but also lower negotiating leverage with merchants because they're not chase, Wells, etc.

So a specific arrangement with a specific merchant seems within the realm of normal to me.