Open Collective is the fiscal host for golangci-lint.

The GitHub Sponsors donations are transferred automatically to Open Collective on the 22nd of each month (Open Collective receives them on the 26th).
All donations after the 22nd are transferred the next month. I don't control this date.
The first recurring donation or recurring donation changes can be prorated depending on the billing cycle: for example, a $2 donation can become $0.97/$0.77/$-1.03/... (yes, it can be a negative number)
This explains why there are decimal numbers even if donations are integers.

The thanks.dev platform is only related to dependencies, as golangci-lint is a tool and not a library, the system is not adapted for the project.
The donations seem to appear randomly inside the interface.
The thanks.dev donations are not transferred automatically to Open Collective.
When I will transfer them, fees will be applied, but they are not a part of this report as I don't know them for now.

There are fees on transactions, this is related to payment platforms like Stripe, PayPal, and Open Collective.
You can see the details of the fees ongolangci-lint profile on Open Collective

I live in France, I should convert USD to EUR (currently $1 is between 0.84€ and 0.85€).
I should also pay taxes: I don't know exactly how many, but it is at least 25%.

The theoretical Monthly Recurring Revenue (MRR) is related to recurring donations only and does not consider prorated amounts, fees, taxes, etc.
So those numbers are higher than the reality.

The theoretical MRR is important because it is a good indicator of growth and sustainability.

The numbers, related to GitHub Sponsors, are from the ~22nd of a month to the ~22nd of the next month (take a look at the section "Details about donation platforms and fees" for the explanation of this range)