I personally always favor directness. That said, your post is pretty inconclusive: there's a big difference between 4x1 hour interviews and 4x2 hour interviews.
You do realize that working there would probably give them broad rights over your open source project, right? Standard employee contracts assign work that you do on their hardware, during their time, or that are directly related to their business. You certainly tick box 3.
You also aren't clear if you want the job. If you want it, you're probably going to have to do some hoop jumping. If you don't, then no hoop jumping required.
Anyway:
Hey, thanks for reaching out and it was a pleasure meeting you over zoom. It certainly sounds like [X] has some interesting work, and I'd obviously love to see my project deployed. Given my experience in the area, I can definitely provide [YY].
However, to be direct: while I'd love to check culture fit, your proposed use of my project has validated my ability to write software. I'm not interested in a full interview cycle including code tests.
If you're interested in proceeding, I'm happy to spend up to two hours meeting with your team. Alternatively, perhaps you would rather engage in a consulting relationship where I retain ownership over my project?
If you NEED the job and the leetcode quiz/exam/hoop-jumping is a HARD REQUIREMENT, then you may not have a choice. Tell them it seems a bit weird to run you through the gauntlet after specifically calling out your open sourced code, and maybe suggest an interview that will be more telling on how well you’ll be working together versus deciding “if you can code” (your project should already indicate that?) If they’re bothered seemingly or obviously and cannot take the feedback lightly or seriously then maybe that’s a good indication to consider other opportunities.
You do realize that working there would probably give them broad rights over your open source project, right? Standard employee contracts assign work that you do on their hardware, during their time, or that are directly related to their business. You certainly tick box 3.
You also aren't clear if you want the job. If you want it, you're probably going to have to do some hoop jumping. If you don't, then no hoop jumping required.
Anyway:
Hey, thanks for reaching out and it was a pleasure meeting you over zoom. It certainly sounds like [X] has some interesting work, and I'd obviously love to see my project deployed. Given my experience in the area, I can definitely provide [YY].
However, to be direct: while I'd love to check culture fit, your proposed use of my project has validated my ability to write software. I'm not interested in a full interview cycle including code tests.
If you're interested in proceeding, I'm happy to spend up to two hours meeting with your team. Alternatively, perhaps you would rather engage in a consulting relationship where I retain ownership over my project?
Cheers.