Disclaimer: not a chemist, product developer or come from a dynasty of SAs, did a little reading on base oils years ago, so influencer level of knowledge
Had a little look at that brand and their ingredients. They seem to use a lot of different base oils and not the inexpensive ones, and if the oils are cold-pressed or CO2 extracted, high quality etc., that's not cheap. But it's not THAT expensive. Also, they seem to throw everything at once, when just a mixture of 3-4 oils will do the same thing. However, the amount of essential oils in their products is criminal. I know not everyone will react to essential oils or have a problem ever, but a lot of people will. Especially if you put them over AHAs, retinol or any active ingredients, not to mention citrus oils which are phototoxic or photosensitive. They have a "Summer Oil" with practically every citrus oil, wtf?