buymeacoffee.js

let page = 0;
const rxp = /bought (\d+|a) coffee/g;
const url = new URL("https://www.buymeacoffee.com/tGJba8O");
url.searchParams.set('notification', '1');

const gifts = [];

function addResult(text) {
    gifts.push( ...[ ...text.matchAll(rxp) ].map(m => Number(m[1]) || 1) );
    const nbCoffees = gifts.reduce((p, n) => p + n, 0);
    console.log('gifts', ({
        nbGifts: gifts.length,
        nbCoffees,
        total: nbCoffees * 5
    }));
    ++page;
    go();
}

function showTotal() {
    const values = [ ...new Set(gifts) ].sort();
    const results = values.reduce(
        (p, c) => ({
            ...p,
            [c]: gifts.filter(g => g === c).length
        }), {}
    );
    console.log('distribution', results);
}

function go() {
    url.searchParams.set('page', page);
    fetch(url.href)
        .then(r => r.text())
        .then(t => t ? addResult(t) : showTotal())
}

go();