Hello, On micro job sites such as Fiverr, it appears that many people are selling supposedly quality backlinks daily. For an average starting price of $5, it may not sound like much, but when you start receiving dozens of customers a day (like these sellers are), it comes out to be pretty good money. Now I'm no SEO guru, but I've been around the block a few times, and I know that you can't get "500 quality backlinks" for just $5. The links are most likely spammy, but that isn't my point. Regardless, these sellers are recieving countless 5-star ratings and pocketing easy cash on a day to day basis. What software are they likely using? Since it is highly likely the links are not done manually, do you have any idea of what sources these sellers are using to sell these types of services? I'm not asking anybody to do legwork for me, but I'm pretty narrow-minded when it comes to SEO software, so any information will be helpful to me. Thanks in advance.