I have seen people being paid for adding links to their signatures....
These Peoples should add rel="nofollow" to the link, to follow google guidelines.
please read
https://support.google.com/webmasters/answer/96569?hl=enPaid links: A site's ranking in Google search results is partly based on analysis of those sites that link to it. In order to prevent paid links from influencing search results and negatively impacting users, we urge webmasters use nofollow on such links. Search engine guidelines require machine-readable disclosure of paid links in the same way that consumers online and offline appreciate disclosure of paid relationships (for example, a full-page newspaper ad may be headed by the word "Advertisement").
More information on Google's stance on paid links.exemple of suspicious links found :
<a class="ul" href="https://fortunejack.com/"><a class="ul" href="https://ethex.bet/?utm_source=bitcointalk.org&utm_campaign=sign_camp">if no distinctions are made between paid and free links that could cause penalty to bitcointalk on google, which should be at least not a practice to promote in the "Newbies - Read before posting" topic imo :-P
Ok, the forum can't get 100% clean, but I think it can improve. first by showing good exemple. if fortunejack want link without nofollow they should them self contribute to forum (employees, friends, their community, ect...), not buying links (otherwise the links need to be nofollowed).
I like this forum, because of what people here did, and also for the decentralised spirt, giving voice to the devs and opportunity to get visibility for the project.
Thanks !!!