You linked it like this:
70 --> 10 --> 10 --> 10 --> 10

The 70 is out of bounds, so the eligible links look like this:
70 xx 10 <-> 10 <-> 10 <-> 10

Therefore the four guys that are level 10 all gain 3x normal XP. The RAF link works reciprocally, and apparently does not suppress eligibility when out of bounds - it just doesn't grant it.