1) If you fully read both JDs the first states it's a paid developer and explains the compensation is a fixed fee for a given deliverable on a project (aka. "scoped functionality") and can scale to a % of the entire project fee once we develop a trusting relationship with the developer. The photo that was clipped explains that if you read the entire paragraph.
2) You are correct people have only been building agentive solutions for less than 2 years, which is why it says "and custom code functionalities and integrations" which doesn't need to be related to AI agents.
Job descriptions are made to describe the most ideal candidate, when you have years of experience in industry and been through multiple rounds of hiring you know that just because a JD says "10+years" for example doesn't it mean they only hire if you have exactly 10 years or more the exact "key word" experience they used. Statistically those candidates are far and few between, the reality iscompanies want a relevant amount of the most recent years experience to be directly dealing with the technologies asked for and they understand the rest can be with related technologies in the same field. This goes for multiple industries (e.g., sales), you don't need to sell software your whole life, to apply for a software sales position, if you've been successful at selling other types of high ticket products you can draw parallels from your experience between the two.