i dont know if you are going to collect push subscribers but i think evadav dont allow to do so. you should check it in terms and conditions. 1.4 Use of landing pages for collecting push-notification subscribers is strictly prohibited.
rtx has this issue they often reject creatives right in the middle of successful campaign and then when you submit again it can take days to approve again. try that your lander dont have entry pop or exit pop
which course you are talking about? are you using tracking while doing direct link? which type of offers you are direct linking? rtx have many parameters and tracking options available if you place pixel on your landing page.