This looks really nice. Zotero has never stuck with me for some reason but I last used it a few years ago. I'll try again.
One problem with this type of service is that there's usually a huge jump from unpaid to paid, but the jump to the lowest paid tier of Zotero lets you pay $20/year for 2 GB of storage. I can handle that. I have more difficulty with the $15/month and $90/year and such paid tiers. Even at $20/year, that comes to $100 after five years for what is largely a donation to support development.
One probably non-obvious thing is that the $100/yr ish unlimited storage tier includes everything you do as a user including shared libraries.
So if you have a group of people working together in a group library, one shared library subscription covers all of them. It doesn't take many people to make this worthwhile.
And as you say, it's a good way to support a great project. I do it even when I'm not really using the software.
> I do it even when I'm not really using the software.
I'll drop a one-time donation of $10 or $18 or something largely independent of my use - or even if I don't use it at all. I don't treat it as a purchase, though I can understand that others do.
One problem with this type of service is that there's usually a huge jump from unpaid to paid, but the jump to the lowest paid tier of Zotero lets you pay $20/year for 2 GB of storage. I can handle that. I have more difficulty with the $15/month and $90/year and such paid tiers. Even at $20/year, that comes to $100 after five years for what is largely a donation to support development.