Assuming you've built any sort of deck around him, there's no way you draw fewer than three cards off of him when he comes into play, and that's a pretty good deal for six mana
The problem with building a deck around Fynn is that you need an abundance of deathtouching creatures in the deck to pull off the ever-satisfying Infect win
Despite that, they've never really had the chance to thrive: the cost of getting them into play and then crewing them is too great, and the payoffs for doing it are often too low
If that card is a snow card, you have the option to reveal it and add it to your hand
It has beefy threats, but absent powerful ETB abilities, getting working hard to ramp out a Colossal Dreadmaw only to see it Pacified or Murdered is horrendous
Now its approaching over $1,000.