I think people made sort of hand-wavey offers previously but should've been more concrete; I should have at least, or taken some more initiative to help out and say, hey, there are very viable, better alternatives here (and to be fair, there still are).
I do have to read some malintent into this (not on your part) of them repeatedly asking you to partner over the years – your resistance seems to have been a good natural instinct, and I'd ask you to reconsider, even if it is a bit rude on your part (good on you) – in my guess, because they know Yotsuba&! is a popular series, it will get their name even farther out there and credited, drive traffic to their website, etc. It just seems like an attention ploy, and it's sort of ridiculous to want to be credited (& restricted access for 24 hrs on other sites) for providing you some JPGs that can be purchased on Amazon for, like, $5 or less anyway.
I guess this is a pretty negative take on it all, which is actually pretty rare for me to have, and such a strong opinion at that – and I know I'm being a bit harsh – but I'm really not too happy to see this. I've seen it demonstrated for years that you do this for the joy of it all, and your (and everyone else's) love for the series, which is what Yotsuba&! is all about in the end… not directing people to some shitty personal site that gets off on restricting access and boosting their personal brand and name.