What IF I'll do black seo on other websites and link them to my main website ? My .com website will be penalized for this ?
no your main site wont be.....just the cloak can be penalized...if that were the case 888.com would have been out of business along time ago
Yes, your site can be penalized, google hasnot entirely fixed the google bomb problem. BH sites will eventually be banned, so if they still link from you google can penalize your site for having a link coming from a bad neighborhood.
Google doesn't really penalise you for incoming links, since there is no way of filtering who links to your website from where. Just don't link back.
your main website will not be penalized, that is for sure , however I recommend you to have some good links pointing to your money websites so there will never be any problem , I don't think that it is a good idea to have backlinks only from websites that are using black hat seo, however at this moment google is not penalize anyone for this strategy.