In order for Mega to added to embedupload, you need an account. And to get an account on that service, it requires an legal business.
That, and Mega has a max of 50 GB of storage per account.

For some time jheberg wasn't successfully uploading to mega, so I stopped for a bit (it was getting annoying creating an account that did nothing).

But yesterday and today I created an account and has been uploading to mega without problems.
So unless something happens, I should provide mega.
Also for jheberg, I recommend creating an account, it doesn't have to be a real email, a fake one will work (no account creation confirmation).
Creating an account will bypass the 10sec delay to going to one of mirrors.