Hello, look everything seems to be working fine, I can see my banners etc... But I got a question: where can I find Banner ID?

there's a reference about that but I can't find that thing to manually insert banner's code like: <?php if(function_exists('osp_banner_button')) { osp_banner_button({banner_id}); } ?>
So if I manually wants to decide wich banner is on X position or Y for Payment Plugin to cooperate.

I found the ID's but the banner only shows up when I use <?php if(function_exists('ba_hook')) { ba_hook('my_custom_hook'); } ?>
If I use for example for specific banner <?php if(function_exists('osp_banner_button')) { osp_banner_button(2); } ?> it shows the text: Advertise here!

if the user ask for that banner and pay for it, the ad won't show up.

@slicer
Banner ID is hidden (you could see it on page's source code), will show it as readonly in next version.

The code you've posted is correct, it's showing just button. You put hook line above, so final setup is like:
<?php if(function_exists('ba_hook')) { ba_hook('my_custom_hook'); } ?>
<?php if(function_exists('osp_banner_button')) { osp_banner_button(2); } ?>

could be improved a bit... you could use also ba_show_banner($id) to show banner.

Amazing man ^_^ works really awesome 

ba_show_banner($id) is tricky because we can set different places and display different banners.

Cool