Assalamu’alaikum warahmatullahi wabarakatuh السَّلاَمُ عَلَيْكُمْ وَرَحْمَةُ اللهِ وَبَرَكَاتُهُ
يَا أَيُّهَا الَّذِينَ آمَنُوا إِنَّمَا الْخَمْرُ وَالْمَيْسِرُ وَالْأَنصَابُ وَالْأَزْلَامُ رِجْسٌ مِّنْ عَمَلِ الشَّيْطَانِ فَاجْتَنِبُوهُ لَعَلَّكُمْ تُفْلِحُونَ ﴿٩٠﴾
O you who have believed, indeed, intoxicants, gambling, [sacrificing on] stone alters [to other than Allah], and divining arrows are but defilement from the work of Satan, so avoid it that you may be successful. (90)
poker and gambling are haram and anything that has to do with them is haram ,lets take the word avoid it has been said to avoid alchol for example but that doesn't mean u can sell it it is haram and to be avoided (not just don't drink but avoided for u will be lured to , so u don't sit in a place where it is being served) another example in the very begining when Allah created Adam and Eve he didn't say don't eat from the tree but said avoid , so don't come near it so apply that in the alcohol and poker .
and really without even saying all that u r helping people to do something haram u r participating in it of course it is haram.