kmzero author of Hello Script Oct 24, 2015
@paperglyph - thank you for the compliments. Putting ads for the full commercial version is the only way that allows us to provide the community with a quality free-for-personal-use version of a professional typeface like Hello Script, that takes more than two months of work to develop.
We happily give away our fonts for non commercial use: so they really are "free for personal use". But we noticed that if we don't put any ad in free-for-personal versions, everybody would assume our typefaces are totally free - thus forcing us completely out of the business - or allowing us less time to refine the quality of our typefaces.