I've used Fiverr and it's a fairly low-risk site. You spend $5 and usually get what you paid for. However, the key issue is that you have to pay very close attention to what you're actually pay for since it may not be quite what you expect.
Always filter the fiverr by rating otherwise it's a crapshoot.
If you don't get what you've paid for, Fiverr kinda sucks because they leave you to settle the dispute on your own with the seller.
Good free source of fitness tips. Articles from hundreds of different people, so the article quality does vary somewhat. Overall, the articles are edited and reviewed before publishing, so the info's accurate.