Search results

You mean on FB ads? You can now check ads of your competitors on their pages. Also you can try using search options, sometimes it shows some running ads. Also tools as AdEspresso have ad database and some analytic tools you might like.

What is engagement? Could be that people like and maybe share your add but for some reason do not click. Maybe offer is not clear or link/button is hidden. Hard to tell just from this info :)

Highly not recommended. If you ad acc gets blocked so will payment method and this means all the acc related to that payment method.

If possible I would like to have a separate page for every traffic source and even different audience. This way you can split test and craft it to a specific audience. Most likely your cold organic SEO traffic will be a bit different from Facebook traffic.

Depending on the reason they did this, but if you don't have a rep, and probably you don't if you only starting - start using another ad account with the different payment method.