I can’t find rhyme or reason. My Pro plan is RSA, and a medium-aged free plan is ECDSA. My free plans seem to be 50/50. One Biz is RSA, and the other is ECDSA. Ent plan is RSA.
They all score A+ at Qualys, though.
UPDATE: Maybe I’m not reading the reports right. I have one domain using ACM, which says it issued both, but Qualys looks like it’s only looking at the RSA cert.
Yeah, I’m not reading the reports quite right. One Biz plan has both certs, and one is ECDSA only. Some (but not all) other plans I thought were RSA actually have both. I’m just going to again.