I use wildcards on my main domain and have quite some actively used subdomains. I would like wildcards, but as this doesn't seem to happen anytime, i would like the limits per domain raised to 20-50 subdomains. Is there any problem in granting more certs per domain? The number of certs does not change, when i would need to buy more secondlevel domains for example, just to get the needed certificates. So the limit on subdomains seems a bit arbitrary, now that letsencrypt went public.