First time using FB ads. I thought I'll just give it a try by direct linking with FB ads. But there's this conversion pixel that FB wants me to put on my website and it won't continue until I do that. It's not possible to do that if I am direct linking to the CPA offer. I thought if I change the optimization from 'conversions' to 'impressions' then it would no longer require that but it didn't make any difference. So what's the solution? Or is direct linking not possible?