It honestly is not worth the time to go to an interview. They offer no health benefits, no 401k, or really any benefits at all. Supposedly, you'll get a couple weeks of PTO but they expect you to be on call when you use your PTO.
They have a stated expectation you'll work 6 days a week for a below market salary for an eCommerce company with these responsibilities. For reference, I can get an offer +$10k over their best offer, with good health benefits, 3+ weeks of PTO, and a 401k with a decent match.
They don't communicate effectively and they will call you at your current employer without notice, expect you to pick up, and then hold a 30 minute phone conversation.
They also lie to you to get you into the interview then give you an offer substantially below your current salary and/or the amount you give them initially. I'm not sure why they believed that would work.
My recommendation is not to waste your time and interview with a company you can take seriously.