I am trying to become a member, but they are not accepting my application. I have sent them over 20 letters, but I haven't received a response yet. I think they are not accepting new applications and are not accepting foreigners.

I have BTC in my account as an advertiser, they don't let me withdraw them for weeks and don't answer my messages.

If you're on a small budget, don't buy traffic. Even for a relatively cheap format like Popads, you'll have to shell out a lot of money to find a profitable campaign, especially if you're new to paid traffic. Plus, you have to pay for some tools (spy tools, a good tracker...), you need a way to filter out bot traffic (popads have a lot of it). I made the same mistake as you did when I started doing paid traffic when I had a reasonable budget, so I don't recommend it.

Every day my site gets hundreds of useless clicks from popcash.net. If you are one of those who buys this "traffic", know that it is 100% bot traffic. Definitely not human, just a referrer spam, that's all. Don't waste your money for nothing. Added to Google Analytics blacklist

Hi guys. Not so long ago with popcash I started driving traffic to YouTube videos, but YouTube doesn't allow the pop under format, so popcash is just useless. I don't recommend it. Are there any alternative ways to get traffic to YouTube videos?

Yes, Popcash can be a good alternative to AdSense for small sites, but they are super aggressive in terms of showing their ads. Payouts are good, fast, compared to other networks, but the support is very bad.