You keep asking why certain domains were banned. They were warned, they didn't follow the rules, then they were banned. Take it up with them for being shitty users.
Voat has specific rules about spamming. Every domain that's banned gets a warning and given time (sometimes months) to comply. If they continue to break the rules, they end up banned. It's their fault.
If you don't like voat's rules you're welcome to start your own site.