Yes. The reason a social network works is because of its brand, adoption, and network effects—not features (App.net sounds like a Boomer social network).
Twitter is so well-established that introducing a premium paid version would be de-facto successful—if done properly, not like Twitter Blue—for producing revenue. Especially because so many people rely on it to communicate.
A rough example:
Twitter Basic = Free. Follow up to 50 people. Bookmark up to 100 tweets. 140 character limit. Ad supported.
Twitter Pro = $5/month. Follow up to 500 people. Unlimited bookmarking. 280 character limit. Up to 10 minute videos. Customized ads.
Twitter Business = $10/month. Follow up to 2500 people + all of the above.
Twitter Elite = $15/month. Elite Checkmark, unlimited follows, all of the above, + 420 character limit and up to 30 minute videos.
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It can certainly be done, but it requires creativity and speed. Both of which waved bye bye to Silicon Valley about 10 years ago so it will likely be a mediocre version of the above at best.
Social networks work because people enjoy using them. As people tell their friends about the network, they use it, and network effects allow it to grow. As it grows, its brand is established.
Twitter is a distant fourth or fifth place network because, as it is, most people do not enjoy using it. Its Brand is wildly seen as synonymous with toxic parts of our culture.
And your plan is to make it worse and then charge people to use it.
It really depends on how you use it. Just based on your attitude it's clear you're engaging with bad stuff and then blaming that on the greater experience of the app/network as a whole. If you follow a bunch of politics stuff (which is inherently inflammatory) or seek out arguments with people you know you disagree with, yeah, you're not going to have a good time.
You can only follow bible quotes and motivation accounts and not once encounter any "toxic" behavior. It's 100% up to the user. Ignoring that is just ignoring reality (which like I said earlier in the thread, most people need to take responsibility for, but won't).
Twitter is so well-established that introducing a premium paid version would be de-facto successful—if done properly, not like Twitter Blue—for producing revenue. Especially because so many people rely on it to communicate.
A rough example:
Twitter Basic = Free. Follow up to 50 people. Bookmark up to 100 tweets. 140 character limit. Ad supported.
Twitter Pro = $5/month. Follow up to 500 people. Unlimited bookmarking. 280 character limit. Up to 10 minute videos. Customized ads.
Twitter Business = $10/month. Follow up to 2500 people + all of the above.
Twitter Elite = $15/month. Elite Checkmark, unlimited follows, all of the above, + 420 character limit and up to 30 minute videos.
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It can certainly be done, but it requires creativity and speed. Both of which waved bye bye to Silicon Valley about 10 years ago so it will likely be a mediocre version of the above at best.