Yes, PULSEpx will always be free to use. There will always be Quests available with no entry fee. However, some Quests with larger prizes may require an entry fee in the form of Pixels. Additionally, if you want to make a late entry or submit multiple photos to a Quest, there may be a fee in Pixels.
Pixels can be earned through participating in Quests, completing daily tasks, redeeming Pulse Dollars for Pixels in the Redemption Shop, or through purchase. This system allows you to engage with the platform and earn rewards without any mandatory costs.