You can use one account to follow people across the Fediverse, you don't need to sign up on multiple servers.
Having said that, a lot of people do use multiple accounts (or "alts") if they want to post themed content. For example, some have alt accounts just for food content.
All Mastodon apps support being signed in on multiple accounts, and let you switch between accounts easily.
If you do use alt accounts, keep them on separate servers so that a problem on one doesn't take them all down.
@feditips I personally find it confusing when people use multiple accounts. Who do I reply too? Although I can see having one as a backup.
You reply to the account that posted whatever you're replying to? It will happen automatically if you click reply.
A good use for alts are themes, for example I've got lots of accounts which are each for a specific purposs: @feditips for tips, @FediFollows for follow recommendations, @FediVideo for interesting videos on the Fediverse etc.
@feditips @FediFollows @FediVideo Ya but what if they post using that account and then don't check it. It's problematic Imo
Yes, that's true.