From what I've seen, they are a sincere, committed and enormously dedicated bunch. I feel more sympathetic towards them the more I hear how strange some writers are. One of their motivations is to have a piece accepted in yearly anthologies. Both the various Best Short Stories anthologies and the Forward Book of Poetry perform the role that the US equivalents do, though we have no equivalent of the Pushcart Prizes especially for small press publications. Editors are so often on a hiding to nothing.
Misprints are one danger - few magazines send out proofs.
A few editors ask for changes. One editor suggested the removal of 2 verses. I fought him down to one. The poem's better than it was originally. With the emergence of the WWW as a publishing medium I can't see the paper market expanding.