Yeah... this "accelerator" is 100% a scam. But honestly, the website is so ugly and badly done that you should have suspected.
If you still want to pay for a legit accelerator, you could use the one from BTC.com (
https://pushtx.btc.com/) which may not be worth depending on how much they charge, but it really works. Other than that, I don't know any other legit paid accelerator. And the free ones are doing nothing this days.
Edit: just checked the price for your transaction at the BTC.com accelerator and they are charging you $60. Not worth at all.