Fellowship

The game can be purchased for roughly 25 USD. This purchase includes all playable content but additional purchases are available that grant cosmetic content. There are currently 3 cosmetic packs, each containing 3 cosmetic outfits and 1 cosmetic mount.
These packs can be purchased individually for roughly 20 USD each or all three together for roughly 40 USD.

The game is currently in early-access and more monetization is expected to follow in the future. The developers have stated in several FAQs that microtransactions will be part of the game in one form or another:

Yes, we’re currently planning for there to be optional cosmetic-only microtransactions when Fellowship launches; however, there’s nothing set in stone just yet, as the game is still in the early stages of development. We will be very open with our community about how microtransactions will be handled when the game launches, and want their feedback on this and what post-launch content would look like.

Fellowship will be buy to play. There are plans for some type of cosmetic system/shop for further monetization.