You do you, but it's better if everyone donates a bit of money to a lot of projects than donating a ton of money to a single project. It's not like a single individual with a normal salary could fund a project alone anyways.
Let's suppose that 10 people have 10 dollars to give each, and there are 4 projects which they all use: Project A is the most important for 7 people, so they recieve $70. Then comes project B with $20 and C with $10. Project D gets no donations.
But if we ponderate them by average importance it would be: A=0.5, B=0.3, C=0.15 and D=0.05. If they had split their donations, the allocation of funding would have been way more efficient.
Ive been using Gnome with Fedora ever since I switched to Linux. So far it has been smooth sailing. I would say the choice of distro doesn't matter that much, both Mint and Fedora are very easy to use. Just pick one with the Desktop Environment you like the most. If you are not sure, test them on a Virtual Machine.