As we understand, You saw our investment programs. Initially, TIER 5 (1 ETH) program is the most profitable one. Also it is important to note that all our programs are separated - that means that we have 5 separated "trees" (because we have on 5 investment programs). So, the popularity of each program differs from other programs (within the framework of our project). So, it might be that two TIER 4 (0.5 eth) programs may bring You more profit them one TIER (1 eth) program, because the first one is more popular then the second.

Well, it was just an example. So, please don't take it so serious.

And actually, it is rather difficult to say which program is the most popular, because each week the popularity of each investmet program changes (not strongly, but still)

In that case, the only advise that we can take You - to diversify Your investments. Such way will minimize Your risks. Basically, It works in all spheres of investments, not only ICO.