1. we can't count it, so mane newspaper are published around 1 day!
2. Subscriber - it's a human, who pay news agency, which sending to him their newspapers
3. Interval for most agencies - 1 day. To keep people knowing and have a lot of interest news
4. They post adverbs and use not expensive paper.
Ы МОГУТ БЫТЬ НЕТОЧНЫМИ ИЛИ СОДЕРЖАТЬ НЕБОЛЬШИЕ ОШИБКИ! РЕКОМЕНДУЮ САМОСТОЯТЕЛЬНО ОРФОГРАФИЧЕСКИ ПРОВЕРИТЬ ТЕКСТ!