bondi, Coinex isn't a p2pool, and the share difficulty is likely to be much lower there.  You may therefore (particulary noticeable with relatively low hashrates) end up being credited with lots of small payments  at Coinex rather than fewer and more spaced-out but larger blocks of payments at a p2pool like TreasureQuarry. Overall the long term total should end up roughly the same depending on your luck.

cheetah3, there's no minimum hashrate for mining, but if you have a relatively low hashrate please be aware that there may be longish gaps between you getting each run of payments

djdive, what speed is your miner reporting.  The hourly graphs look red and spikey which would indicate either a very low hashrate and/or you may need to check that you've got an appropriate +number after your IFC address to get your miner to report appropriate pseudo-shares to help your graph look better

alfaz12, remember that finding a share is all about luck.  You seem to have just unlucky been unlucky since the 8th December when mining on the iGFsfap8SV8eMaTECwXfWMviM8NJck9bhm  but got lucky with the i3up41evA7Ca2t3ZxQpZutqGfGrBaLUMf2 address.