I don't know what is with 5D but getting any type of non-BTC payment from them is like pulling teeth (as it used to be not like this). In addition, if I recall correctly, their checks are drawn from foreign banks and it takes a few weeks to clear.
I tried in the last couple months to get a measly (in relative terms) payment (e.g. - Moneygram). It took them a long time (for whatever reason) to get back to me. I was so fed up with the process I converted to BTC at that point. Never looked back.