I am a seasoned developer and designer but my SEO skills still need some brushing. I'm gearing up towards developing my gambling-related website.
I'm looking into adding a Directory section on my site where my goal is to index all gambling-related website on the internet. This can either be manually added by site owners or by the admin but mostly looking into the feature where anyone can add their gambling-related website in the directory themselves (then approve by admin). Specifically, a directory feature like the Open Directory Project (http://www.dmoz.org/) but segmented only to Online Gambling.
When adding their site in the directory I would like an added option where they could link back to my site in return. The directory will be free for all so I'm asking for back links in return if it's alright with them.
My questions: Are there any SEO repercussions in doing this? What things do I need to consider to avoid google penalizing my site?
Please advice. Thanks.