Should I use social networks besides Facebook and twitter?

I'm thinking of making a website and of course it's the norm to make a Facebook and/or twitter for it for marketing purposes. I see that people have links on their sites for all sorts of social networks. Is that a wise thing to do? Won't you have to update them all at the same time? If someone follows... show more I'm thinking of making a website and of course it's the norm to make a Facebook and/or twitter for it for marketing purposes. I see that people have links on their sites for all sorts of social networks. Is that a wise thing to do? Won't you have to update them all at the same time? If someone follows you on all of them, won't they get like 3x, 4x, 5x the updates for the same thing?

Example: I say "new section added for music". If I say that on all of my networks, won't some people get that update in multiple doses?
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