Okay, it appears maybe the addresses for custom domains was inaccurate because you list custom addresses & aliases separately for some odd reason. Why do you do that rather than saying unlimited aliases with a bullet point about only allowing 15 for domains you own?

The Revolutionary plan still only offers 3 custom domains. Furthermore, SimpleLogin provides unlimited aliases (custom domain or not) for $4/mo & unlimited custom domains. So SimpleLogin still appears to be more competitively priced overall.