no.. its not all.. there are many wikis which is do follow.. you can search it in google.

Most of the important WikiLinks, which actually have the ability to drive traffic to your blogs/websites are NoFollow to fight spamming.

But even if you add a NoFollow link to these Wikis and is Relevant, you can generate A LOT of traffic.

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I have a list of about 2,000 dofollow wiki websites

Why just wikis, have you seen good results from these?

Wiki links are also a good way to diversify your link building activity. It can help look your SEO strategy very natural provided that your wiki submission is also of quality content.

i always build wiki backlinks for my web2.0 and article links. i never use them directly to my money site.

Yes, "most" wiki sites are nofollow, but there are still quite a few dofollow wiki sites as well.

No matter if wikilinks are no follow links. They still hold good importance. If you get few wikilinks, they can give good amount of referral traffic. Moreover the site authority also develops if you have enough links from wiki. Google wouldn't like mere Do follow links hence mixing few good no follow links would keep on safe side.

If you're looking for DoFollow wikis you just have to look for them online or buy it from someone who sells them. Wikis are great links to have because it increase the diversity of your backlinks to your website.

I think most of them no follow about 98%.