ATTN: Need help spying on competitors CPA offers.

Hello Members of BHW,

I am newly into the IM world and looking to start my CPA offers with sweepstakes using propellerads / popads. I am having trouble where to start creating my prelanding page.
Is there a way to spy on other advertiser's prelanding pages that are converting already?

I have already looked into ADplexity, but the price is a bit overwhelming for me.
Does anybody know any cheaper methods?

Regards,