Interesting concept, poorly executed. The basic conceit - a timeline of the Mythos on Earth and it's interactions with humanity - is simple enough, and indeed has been done many times before. Unfortunately, it's been done better and more competently than here. The author makes a number of rather silly errors, the most egregious of which is conflating the Flying Polyps with the Elder Things, a mistake that completely re-writes the orgins of mankind and ignores the vastly different natures of the polyps and the crinoids. Still, if you're not too concerned with accuracy, it's not bad. But if you're not concerened with accuracy, why do you want a Mythos timeline in the first place?
The novel part of this item - linking "venus" fertility figurines found all over the world with various Mythos deities - has the potential to be interesting, but is rather clumsily handled. There's no real explanation of why these figurines all look like big women, or why creatures with such radically different body structures produce artefacts that look so similar. It's clever, but unconvincing.
Even as a "pay what you want" item, I find this shoddy, slapped together and more than a little lazy.