That $125 to $175 is post-negotiation, or “post me stating my rate”, after they have called me. Basically, as with any signing service, ServiceLink/Exos is willing to pay if and when they really need a signing done. However, they can get someone for $75 or $85, they will.
Per recent RON discussions it is worth noting that they pay $85 for a RON refi signing. Imo, that is reasonable, It’s also higher than some other signing services’ RON fees, as well as being a much better deal than $85 for a mobile signing.