If you don't hit 9ch then your hardware is so weak that you find no blocks. If you find no blocks for the pool then why would somebody give you 6-7 XPMs/day for no value you bring? How can it work on beeeeer: you find no blocks and they give you 6-7 XPMs for that? Is beeeeer charity or what?

In my case I've found 3 blocks for ypool since Sep 23. Ypool paid out about 20 XPM using their value system. It's about right, but still I've found more XPM then ypool paid out to me. I would actually prefer even more agressive values system, something like solo mining:

found block: 1.0 value
9ch, 8ch, 7ch, 6ch: 0 value.