// For points currency only
end_s(Vars::$conf->referrals->signup_bonus_upline,Vars::$conf->payments->point_label)

// If you want a toggle between the two (1 == currency, 0 == points)

(Vars::$conf->referrals->signup_bonus_upline_asset == 1 ? asset(Vars::$conf->payments->default_asset,Vars::$conf->referrals->signup_bonus_upline) : end_s(Vars::$conf->referrals->signup_bonus_upline,Vars::$conf->payments->point_label))