How many social sites can be involved in a bookmark exchange?
In a social bookmark exchange you are only limited by the number of social sites you and your trade partner have. In a each trade scenario an equal number of social sites are used for fairness in trading. If you have 10 social sites and your trade partner has 10, you can trade with up to 10 social sites in a single trade. If you only had 4 social sites and your trade partner had 10, your trade would be limited to 4 social sites.
