Any blog sites work for better result if we provide something interesting and unique and related information to that topic. And if the content is not related to that topic then any site will delete it.
I have 2 or 3 Blogger blogs for EACH one of my websites. I have different information on each of them and have found they are great for backlinks. Remember to alter the html to take out the defaul nofollow tags though!
I agree with prcys, whether it's free or your own domain.. you just need to come up with good unique articles in order to attract someone to interact with your post.. Keep on posting informative and unique content, build relationship with other bloggers by commenting at their post and do other basic seo stuff and you'll see some improvements.. Good Luck
Blogger is great though I wouldn't use it for any sensitive topics such as 'make money online' 'adult' or anything else ... Google will drop it without warning .. should you get a manual inspection and violate their TOS