affiliate server hosted galleries are FHG...unless you mean hosted galleries created by the submitter
it makes no difference if the gallery recips back to the tgp are optional to a webmaster if they are using FHG from THEIR sponsor.. now if someone were to submit a gallery hosted by a sponsor (a FHG with their refcode instead of the webmasters) that's just lazy.. In which case you don't deserve to be submitting at all
however if you personally made the gallery yourself (design, etc.) then it's a different story (hosting provided by the sponsor or one you paid for makes no difference)
most of the time FHG's have a bad content / advertising ratio -- that's why submissions with more content than advertising are favoured.. it keeps the surfers happy