2. I am saddened that the going rate for short stories in most print erotica anthologies these days seems to be $50. When I first started selling to anthologies, a bit over a decade ago, the going rate was $100. So, for a 2000 word story, instead of getting five cents a word, you're getting 2.5 cents a word. And if your story is longer, well. I am utterly not ashamed of writing to the lower end of the requested wordcount as often as possible. It's easier to fit a shorter story than a longer one, anyway, so chances of acceptance go up.
The Mammoth Book of Best New Erotica, a reprint anthology, still pays roughly $120 USD, but I think the first time I sold to it the rate was roughly $150; that might have to do with changes in exchange rates. Because the editor is in England, he pays in pounds. There are both British and American editions.
3. I love reprints. I love getting paid twice for the same story, particularly if I didn't get paid much for it in the first place. I am sad that there are fewer opportunities for reprints these days; in a quick, admittedly limited survey I just did of current print anthology calls for submissions, none accepted reprints. The main market seems to be anthologies that accept only reprints.