Reply to @twistedweb123:
Perhaps I read the new modification feature rules incorrectly. It appears that Fverr does allow you to offer 0 free modifications, but then you have to offer at the option for at least one paid modification. Buyers have to have the option to pursue some sort of modification if they wish free, or paid.
Correct me if I'm wrong, but this is how the explanation was worded -- by Fiverr -- when the feature was released and explained.
Noted by @adi_so (Fiverr employee) in her July 2 forum post explaining how the feature works:
"Choosing zero modifications
This will set up a default of 1 paid modification at $5. This is because your Gig must offer your customers the option for modifications. So if your Gig includes no free modifications, then there should be at least one paid modification available."