It would be better to get together with a group of people, and do a private exchange. To be safe, you need at least 3 people, lets call them 'A, B, and C'. Don't do an exchange were A uses B's link and B uses A's link. It would be better to do it in a three-way trade. A gives to B, B gives to C, and C gives to A. This will make a triangle if you do it right! Also, the link should be surrounded by high-quality related content.