If I create a blog with paid functionality, do I have to register a company somewhere, pay taxes, etc.?

Question

Blogs

Let's say I made my blog with several account options (paid and free). For payment, I made a card entry form or connected an external service (for example, paypal).
1. Do I have to somehow register the project by law in order to make a profit?
And a couple more questions on the topic:
2. Do you also need to register as a business for the user agreement and privacy policy ?
3. If I want to protect the content of the site - do I need to register a business?
4. A question in advance: if you need to register, does the domain play a role? Let's say I have a .ru domain, but if I register it in Belarus, will the law also apply to other countries, or is a separate registration required for each country?
I could not google the answers to these questions :(
If you can throw links, I will be grateful!

Answer 1

It doesn't matter what you do - a blog or a grocery store.
The only question is - do you have cash flow.

Answer 2

1. if not the media, it shouldn’t,
but it’s better to keep the requisites coinciding with the tax ones
2. it’s possible for an individual entrepreneur or even an individual, if you sleep peacefully regardless of fame
3. also not, it doesn’t matter at all for whom, as long as everything is correctly formalized by contracts
4. and will and will not, look at the hammer - the anvil can wait