To start this post off with, I will readily admit that I am not an expert on card systems. These have become increasingly popular in the modern market, replacing the coin acceptors on machines to accept payment. Many FECs use a card system of one brand or another – EMBED, Intercard, Sacoa or Core Cashless and so on – allowing the operators to enjoy a number of advantages over coins.
Thus, I am not well-versed on the major feature differences between the existing systems. I haven’t really looked into them, as they tend to be very expensive. The last time I checked on a system, I was given a rough quote of around $10,000 for a starter package for about 20 games. Granted, this was a while back, but it still was too much for me to dump my tokens, which cost me maybe around $1500-$2000 a year.
When at IAAPA 2018, I visited the Unit-e Technologies booth, where they were presenting a new challenger to the existing systems for arcades to grab. Called RFPay, I filmed some of the system (along with their other technologies such as the Luxehedron, PC Classic and arcade lighting systems) here, with a promise to get into more detail on the site…which is what this post is about below the video:

RFPay Details
According to Eric Yockey of Unit-e Technologies, here’s some bullet points on what makes their system worth the investment.
Competitive advantages of RFPay:

The cashier station can integrate with an existing PC and doesn’t require the operator to purchase an expensive self-service kiosk.
No installation from the seller required (we provide a manual and video instructions)
No training from the seller required (some systems require that the customer pay to transport and house the seller’s staff for training)
No monthly fee required under the minimum service plan (includes 2 months