I would like to know how to optimize a cheats Site , Wallpaper site or a Dating site ( for specific niches) .... These site cannot be optimized for keywords etc ... So how to make these types of sites get a high SERP ? Only through getting many backlinks will help ?? thx in advance
Well you have on page or off page optimization. If you're cutting out all on page, that leaves just off page. Which in large part is getting links to your site... why can't you do any on page?
Are these brand new domains? If so they most likely will not rank in Google for 4 months to a year. I would advise you to use Adwords to drive traffic to your pages and see how well target traffic converts. Use the tracking code adwords provides to discover your most effective keywords, often they are not what you think they will be. Your most effective keywords may be very specific phrases that are easier to rank in the SERPS for. Also, when you get backlinks do not do a link exchange with crap sites just for a link. In fact I would stay away from link exchanges unless they really make sense for your sites users. Try to get RELEVANT one way links form sites within your niche that use the high converting keyword text you found and you will have much more long term success.