This is what I found about Triplemining.

According to their scheme...
User 1 will benefit if User 2 joins his ref.
User 2 will benefit if User 3 joins his ref, but User 1 won't benefit.
...etc

However what I've read in their threads and even gotten a reply back from their users (also a mini pool leader.)
User 1 = Mini pool team leader and will benefit from all users, 2,3,4,5,6...etc.

And

The defense they use...You can win jackpots!!
So tell me what's my odds of wining the jackpots when the pool grows?

So in conclusion.
Only "User 1 or mini pool team leader" will win from his ref + mini pool team hash bonus from 1% + jackpots.