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Those particular forum links are definitely low-quality. "Black-hat" is kind of a loaded phrase, I find, but if you had a lot of links like those, you'd be potentially getting yourself into trouble. The problem is that, when most of us see low-quality links, we assume there are more like it. Right now, those links aren't showing up, so that may be an assumption. The other issue is that, if your link profile is weak right now - if these really are the only links you have - then the quality of those few, initial links can matter even more. It's very important to start out with a solid base, or even a chunk of medium-spammy links can hit you a lot harder.

Martine, I have PM'd you so please let me know if you get it.  We're happy to discuss your SEO and what you'd need going forward. Rick is correct that it's not the cheapest niche we ever do but we have some good plans and do adult product SEO regularly. Happy to discuss - PM me or send an email if you want more info.

I totally agree with you, you do need unique content to rank and Martine's page (coz this discussion took off a bit) had a lot, a lot of unique content. So that's why i was considering that having keywords appearing a 15+ times on her page would not do any harm. Keyword stuffing can affect your rankings, of course, but only if you have thin content and/or if you do it to influence rankings (as an example, a client of mine had his titles on all pages like this: RV Insurance | Buy Rv Insurance | Best Rv Insurance | Rv Insurance Online | Rv Insurance Quotes - and the last paragraph  on each page was 3-4 lines of RV Insurance related keyword spam - and guess what, there was no penalty and the site still ranks well for it's keywords).