This is a solid question. 2 answers from the hip.

1) Putting out branded content that’s valuable and shareable is the best way to make sure your brand survives in lazy shared content.

2) Theft of great ideas? Well, that’s another matter. An idea, once freed, is not yours. You can use it to deliver value-for-value, which nostr, and other social, is great for. But, so can others. If they outperform you on delivering value for value using the idea then that is good for everyone but you, and you can use their inspiration to catch up to them. This is the real world. Copyrights are great for avoiding impersonations, but suck if they’re just being used to stop progress. The best way to keep others from stealing your identity is to be great at what you do, and users will tamp down the impostr due to their loyalty to your brand because of the value being provided by you. Stop providing value, and your brand gets replaced. It’s the circle of life.