nothing at all...it is a true pleasure if my work can help you, indeed the contrib which was completely broken is working now, with more free or paid providers than before.
If someone needs a provider doesn't available, he should raise a bug and please provides settings which match with ddclient (make google search)
Some providers included in the contrib don't ask to log every month to renew your account. I'm thinking to changeip(7 hosts max) dtdns(5 hosts max), and probably many more.
see
http://wiki.contribs.org/DdclientIf a good man wants to read the wiki page and correct my bad english or enhance it, i will very happy.