50 токенов по 0,20$ =10 $  за выполнение элементарных действий. Хм . Хорошее преложение 

Hello, for the pre-sale campaign, starting 2nd of July, we have 30% bonus. As it comes to the main sale, starting July 17th, we provide 25% bonus, which decreases with 5% every other 10 days.