There was one discussion on popular IM forum with the problem titled that "99% of indexing services are a scam".
Problem was that crawlers NEVER come to the pages that users sent for crawling.
We guarantee that crawlers (google spiders) ARE going to visit your page and that is when magic happens.
This is related FAQ that you might want to check out.
If you have thin content on page and it doesn't get indexed, you might want to ask yourself do you really think Google will index that page? Indexing of profile links and similar pages in matter of minutes is long gone.