Odds are it's a bot that a user is selling that hasn't been set up to resellers site.
Let me explain,
iBot nexus is a bot that you have to pay monthly/yearly to use. If you buy off a reseller site you get permant use of the bot. If you're paying monthly/yearly you get access to multiple bots but not all are free, generally cheaper though.
The difference is, the users create the bots on nexus site and they are the ones selling them. If they decide to use a reseller (e.g. RSBots.net) They get a certain precent from each sale.
If anyone would like the link pm me, ive been busy botting hence no time to reply ;o
Made 9m in 24 hours with this bot yesterday the banhammer will hit me soon, although profits are rising with this program, just make sure you sell for max! If people do fungus will rise to 1.6k each and it will make 750k p/h