From what I've read at the very least a seed node seems to be the one that we could do with more of, ( I think it's the one that distributes transactions and stuff or something). It's more of a 'more the merrier' kind of thing so long as it's financially viable, and with being a top 20 node I would suspect it is. (based on the $700-800 a week top 20 nodes make, according to the witness reports)
We have a very nice selection of APIs at the moment hopefully most running mira and hivemind and such.
Will be looking into it thanks for the info!