You get paid for shares (or work) accepted so that is what you should be looking to maximize. It is possible the accepted rate is still higher even with a higher rejected rate because the gross (raw) hashrate is higher. [...] Since you get "paid" for shares accepted that is the number you want to maximize.
So if that's correct - I conclude that for people like me, who are mining with high intensity and who are therefore taking a higher risk of getting rejects, pool-mining a coin with a higher difficulty (more time until a block is found) are better of, cause it results in fewer rejects.
Correct?
Since you get "paid" for shares accepted that is the number you want to maximize.
When setting a worker's diff in a pool to a low valule, let's say 32, the number of accepted shares is way higer then with a worker diff of 1024. So I assume you get not only paid for the number of accepted shares but also the size of the batch. Otherwise all people would be mining at diff 32, right?