I don't know especifically about NANOX but I saw in many others coins in yolobit this kind of 0.00000001 orders and I investigate a little.

It's seems to me that bots trading it's not only allowed but in some way promoting their own bot(s) (they're selling 1 at a very cheap price, check in twitter) with two operational advantages: min. bid, for "humans" it's 10K satoshi and 1 fee for all the bunch of orders.
If you look at deep in the bot-trading page you understand how works all the thing and you realize that all this orders are without fees.
Or, better, the bot buy all 0.000001 quote, for example, until arrives a the value you set like down value and sell the same until the high value you set as top.
Probably, via API, they do the trick and only 1 fee (total order) it's considered.

IMHO, I'm not a super-expert of bots, but it seems that it's the yobit-bot-way-of-things.

URL: https://yobit.net/tapi/
Params: "pair=NANOX_BTC&type=sell&rate=200&amount=0.00000020&method=Trade&nonce=" + GetNonce();