Hello @ianpolat
If you buy the theme from themeforest, you only have to buy one license/website (no need to pay every year). Also, the purchased license allows you to use the theme on only one website.
Regarding other questions, is better to ask the theme author, here, in the comments: https://themeforest.net/item/bridge-creative-multipurpose-wordpress-theme/7315054/comments
Hoping it helps a bit,
All the best!