That company in particular has only 2 employees right now (the founders).
With respect to this particular company, I only know them from trying their product, so I wouldn't necessarily make any assumptions around comp when the data doesn't exist yet. Presumably the early employee offers are generous in equity. Usually founding team means high equity, and the company is pretty green as well. They have just raised a $1.9M Series A and they presumably have revenue coming in from their current customers. It's good that they are upfront about the stage.
I think this kind of job can be good for someone who wants to go all-in on their career, potentially right out of school (see their student loan repayment perk), and compress years of learning down to learn things several times faster than a bigger startup and tens to hundreds of times faster than a big company. Seed stage can be extremely fun and rewarding but of course there is increased risk of burnout. Another reason to consider this type of opportunity is if the company or problem they're solving is obsessively interesting to you (e.g., you'd consider founding your own company in the space).
Bottomless is having real scaling pains right now. They have initial traction but their software needs help. As a user, I get the impression from a quality perspective that they've outsourced initial development. There are bugs going unfixed for weeks and months. My first experience with their product was okay: there is potential, but the scale and first coffee arrived weeks late so I had to buy coffee from somewhere else when the projections were missed more than once. They are clearly overwhelmed right now. The second experience was bad: my credit card was charged overnight by surprise for a product I didn't want with the sole warning and option to opt out of the charge occurring overnight < 8 hours beforehand while I was sleeping, then my card being charged before I woke up, then they refused to cancel the shipment and put up a fight refunding to my card. (Their recurring shipping does not run on a fixed calendar schedule so the customer has to rely on the business to notify them of when it determines new orders will be created.) Though I pointed out that this process is unreasonable and also does not match what is listed on their website ("12-24 hours notice"… which is still too low especially when traveling), they did not offer to or issue the refund initially without me being extremely persistent and I had to fight with them for it. They could really use people focusing on these kinds of challenges full time to make the product / service better. I am going to give their product another chance because I like the concept, but for a software engineer interested in this space I'd imagine they're offering an opportunity with significant product ownership given how clearly strained they are right now, how much needs to be built, and their fresh funding.