Did these already have min rank? I had gathered about 20 for my low level alt since the start of the Christmas, but they now show requiring sergeant major. These have been used for getting an alt up to sergeant~ as long as I've been playing here, so not sure what is up with that. The exp scrolls are low on purpose and you don't get them often.

Even mass killing stuff they are rare enough that you will be spending a ton of time checking graves, so it is time-consuming to farm them.

I am not aware that has changed since it was first set up.

I think it depends on where you get them. Low levels have no limits, high levels have some limit.
Should be no issue for quite a few months

I'm not sure if it changed or not, but when I logged back in the next day, after putting down a bunch of presents on the carpet, they had changed from no rank req to SgM required. They were all eaten though, so no bother now