Probably not against the rules, especially if it is in your signature or a guide you wrote or something like that, and there have been people that tried to use them in the past. It is however considered a dick move and if someone in turn quotes you, removing all the links and you complain the staff will probably apologise, mainly as the initial ignoring of the report would not have thanked the quoter.
There have been occasions, most notably for me the time I was asked to install minecraft mods for a client's kid, and if minecraft modding was not as obtuse as it is* then the endless adfly links on most of the main forums people release stuff on sealed the deal.
*all that I am, do and have done for years and I still found installing the...