Unless I'm desperate I'll never do an unpaid take home test again in my life. For me it has been a waste of time and hugely demoralizing. Best/worst story and the one that broke camel's back: at one uber-copycat company I had my test failing on one reviewer. Then after a few months another reviewer interviewing me for another company told me that "this test would be fine by me. Had I reviewed it when I was back at the uber-copycat company I'd pass it".

And my experience was more or less like that with all unpaid take home tests. So, bitter truth is I have more to my life than doing boring unpaid work with minimal chances of getting to an offer and TBH I doubt I'd enjoy working in a company that hires like that. So, my stance is give me as much whiteboard or pair programming or whatever _time_bounded_ test you want and let's go from there.

PS: I looked one of the tests. It said "follow SOLID". I'm not gonna say what I think of SOLID here but it's good that they say what they adhere to beforehand. I mean if you're going to have people pouring hours and days in your tests at least be transparent of what exactly you expect.