I agree with Fabserendipity, we shouldn't contact the providers, we should have a way of complaining to you guys, to possibly remove the shady offers.

Tapjoy is great. On their page the game very rarely crashes, they give the tokens instantly.
ALL the others are extremely shady, and I won't even bother with them anymore:
- Supersonic and Fyber crash my game on iPad Mini 2 (not on my Samsung) just by accessing their page
- Fyber is extremely confused of my location (although I have it enabled), trying to display the page in chinese, arabic, italian, german and all sorts of languages, sometimes more than one on the same page. Then it crashes.
- Pending tokens from Fyber, Supersonic, TokenAds, trialpay (this one I actually contacted) - I won't bother sending emails anymore, as it takes multiple conversations and screenshots to validate 1 token
I'd like the possibility to report in game all these shady offers and their non-payments, instead of sending them mails and screenshots one by one and without them having any repercussions for their bad business.

And their bad business reflects badly on your business, as people may get frustrated and leave, or when the offer pages or videos crash and exit your game, they may not reopen it (not telling you how to run your business, just telling you what I personally experienced)

Thank you

As for videos crashing, I get a LOT (sometimes tens per day) of them on my iPad Mini 2 (dunno if the problems are for this particular model or iOS in general), and none of Android (Samsung)