the only problem with self-signed certificates is, that you have to accept them manually.

for anyone not knowing what the fuck a certificate is this looks "shady". ..but there really is no technical/security issue with self-signed certificates.

a lot of "big" ca issuers have been regarded as "not trustworthy" or at least "shady" in security minded communities. (i don't really know much about this topic, to confidently state something... i just know things are somewhat shady...)

... don't know if a self-signed certificate would be an option for this domain, i wouldn't mind :)