yep. like 99.9% of the code ad networks expect. they want to check DOM state to make sure you are not a sleazy publisher hiding the ads under the content or if you are not being shown in an iframe on some porn site.
with react, they will get inconclusive results because their code might run while they are virtualized or god forbid during the render. and you will only get garbage ads because now they consider you a garbage publisher.
Write your wrapper for ads as a component that renders a div... bind your ad-logic as part of the componentDidMount() event handler. The results should be consistent.
