Preordered it as soon as I saw it was betting a physical release.  Did the same for Mighty No. 9 and Wolfenstein the Old Blood.  After playing Stick it to the Man for free from PS+, I was more than happy to shell out $20 for the physical release to support the developer.  Same for Child of Light.  I would gladly pay $20 for Valiant Hearts should it see a PS4 release.
$20 is a great price-point for this indie games.  Last gen (PS360), it seemed everyone decided that $60 was the defacto price point for every game released.  It was ridiculous.  I missed the days of tiered pricing from the PS1 where a platformer was $30, a smaller game from a less-known dev was $20, your average game was $40 and your big-hitters like Resident Evil, Tomb Raider, Final Fantasy and Metal Gear were $50.  Even with the highest priced titles, I felt I was getting my money's worth out of them.