Great to see someone offering a deal, I used to do exactly this between the end of 2019 and the start of 2021 making my link the best one to sign up with setting a goal of bringing in 100+ active players in which I succeeded. What really helped the most to bring players in was making a monthly summary of all my Splinterlands earnings (Link To The last one which includes all the others) In the end money and earnings is what everyone still is most interested in. I'm not sure that just offering a great deal triggers anyone to sign up, players need to see and believe that they can earn money and you really have to put the time and work into it.

Good Luck!