When I visit SE questions, I can see a "start a bounty" link, but I can't see it in meta sites? Am I not allowed to set bounty on meta (either here or on per-site metas)? Does it even make sense to do so, since per-site metas don't offer rep?
You can do it here, but this is not a per-site meta, it is a standalone entity.
You cannot create bounties on per-site metas.
Judging by the faq there is no bounty option. If would not really make sense anyway.
Seems that I'm wrong about it. There are featured questions.