Adf.ly is a really inappropriate re-director. Absolutely. There's no doubt about that. However, we rely on ads to pay to keep the forum online. Not that this comment justifies the usage of Adf.ly. I'm not entirely sure how Ad.fly links or works with the forum, but I do think it's involved with the upkeep of the forum somehow. I can only assume to pay for the forum itself. I can't give a 100% accurate answer about that so someone would have to come correct me if I am wrong about it. So don't take my word for it. I don't remember which ads do and don't help pay for the forum. I think Adf.ly is just one of those things the forum uses to collect some pennies for the upkeep of the forum itself.
Only thing I can suggest to avoid seeing Adf.ly advertisements is by taking away the https:// from the beginning of the URL you're trying to get to. That's what I do, at least. To avoid it. Though I'm sure there are other options, I haven't really taken the time to look for any since the method I use right now is perfect enough for me. But yeah, I cannot agree more that minors should not be exposed to the absolute trap Adf.ly is. I'm sorry this troubles you.