Quoting because I had this experience with jaxapollo as well. I initiated a trade on January 26th. After exchanging messages jaxapollo informed me that they would send out the four cards on the 27th. I sent my cards out on the 28th. After completing that trade I made several other trades the following week and have since received cards from other members. I still have not received cards from jaxapollo.
I reached out to jaxapollo on February 6th as well as February 9th to see if the cards I sent out had arrived or not as well as asking about the cards they sent. Although jaxapollo has still been active on other forums they have not responded to mine, nor Scoop-Li's attempts of contact.
Just a warning for other members for future trading, I know a few members have had positive experiences with jaxapollo but just be cautious when initiating a trade with this person. It is suspected that multiple people use this account so that could be the issue. Either way though, both me and Scoop-Li are out of our cards we initially sent, as well as the cards that were promised to us.