I use symbols from the EELIB all the time. I picked an LED symbol and put it in my design. After placiing my order with JLPCB I was surprised to find a charge for manual assembly. The cad program had inserted an LCSC part into my design without telling me. I was going to assemble the led myself with a special mount. I have used the EELIB on many designs and it has always just given me a symbol. And if it is going to order a part from LCSC it should tell me.