The company charges between $9 and $16 a month, well ahead of Disney's $7 a month, and Apple's $5 a month.
The sweet spot for Netflix is $6 a month, subsidized with advertising.
YTD, the stock is still up about 1%, but over the past three months Netflix has dropped nearly 30% as competition for cord cutters ramps up.
Threads is a standalone, camera-first messaging app that will allow users to stay connected with close friends through photo and video messages.
"It opens directly to the camera and allows you to add shortcuts, so you can share what you're doing in just two taps," Facebook wrote in a blog post introducing the service.
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