When did you stop mining if I may ask? It's possible your shares fell out of the last-N shares as the effort was way over 100%.

In theory, the rewards for a large pool and for a small pool should equal each other out over a long period of time (not days, not weeks, but most likely months). If you take any random period of time, it's just as likely that the reward of a small pool will be higher than that of a large pool, than it is likely that the reward will be smaller than that of a large pool. It's all about statistics, particularly variance and probabilities. 

The payout is explained in the FAQ, how many of your shares get payed out for a specific block depends on the blocks effort. I'm further copying what I posted on another thread:

100% effort is the expected time it takes to find a block given the pool's hashrate and the network's difficulty.

If it is <100%, this means the pool found the block faster, using less effort than expected. Shares are the unit of effort. If the effort is <100%, some shares from previous block(s) are also included in the reward calculation given this is a PPLNS pool. See round 2 on the graphic in the FAQ.

If it is >100%, this means the pool found the block later, using
more effort than expected. If the effort is >100%, more shares were
generated than are used for reward calculation, and as a result of
PPLNS, the shares early in the stack are silently dropped and not
considered in the reward calculation. See the 5th round on the graphic
in the FAQ.

100% effort is the expected time it takes to find a block given the pool's hashrate and the network's difficulty.

If it is <100%, this means the pool found the block faster, using less effort than expected. Shares are the unit of effort. If the effort is <100%, some shares from previous block(s) are also included in the reward calculation given this is a PPLNS pool. See round 2 on the graphic in the FAQ.

If it is >100%, this means the pool found the block later, using more effort than expected. If the effort is >100%, more shares were generated than are used for reward calculation, and as a result of PPLNS, the shares early in the stack are silently dropped and not considered in the reward calculation. See the 5th round on the graphic in the FAQ.

This is correct. Just to add, this doesn't necessarily mean that you get more reward mining on a large pool finding blocks. On a large pool, you get regular small value rewards. On a small pool, you get the occasional large value reward. Over a long period, the two should more or less equal out.

I am using MoneroGui . No flags in my ESET antivirus. Regarding download time of the blockchain, you gotta wait for that, that's the technical downside of Monero.

Please read what I wrote to the other post here: http://poolmining.userecho.com/forums/1-general/topics/289-my-antminer-mines-since-3-daysbut-i-didnt-get-any-payments-to-my-bittrex-wallet/

Last LTC block was found 4 days ago. So that is your problem. You only get paid for the blocks that you help to find. This is how mining works in reality. Smaller pools take longer time to find a block, but logically the reward for your shares for the block is higher than on a larger pool with higher hash power. Over a long period of time, this more or less evens out and rewards reach equilibrium. On a shorter time frame, variance can swing the expected reward from the mean, meaning you can be either under-rewarded or over-rewarded.

"No new block from 18h, last payment 15h ago"

Learn what variance is.

When you reach 0.1 Dash.

whattomine is highly inaccurate, especially with coins that have high difficulty swings... look at MONA difficulty chart, the swings are huge..

if it is not profitable for you to mine MONA, then don't, switch a coin..