First, this is a common approach with people trying to get more links to their website. They've read some outdated SEO article about how to build more links to their site.
I get these emails asking me to link to their content regularly. No one ever offers me a reciprocal link (a clear violation of Google's guidelines). But I have had people offer me money. That too is a clear violation of Google's guidelines. See https://developers.google.com/search/docs/advanced/guidelines/link-schemes
The few times I have responded to these emails about how it would benefit me, I never hear back from them.
But to answer your questions, there's little risk to you. Neither of the sites appear to be spammy based on their DA. Furthermore, Google appears to smart enough to ignore spammy links and not penalize for it. Additionally, linking to other domains doesn't necessarily reduce your site's rank. See Does using links to other pages dilute the linking page's link juice/page rank?
However, if they aren't going to link back to you, how would they send you traffic? Are they going to mention your company or your website anywhere? Or are you simply hoping that their having a lot of visitors (which is always a guess if you don't have access to their system), will somehow generate traffic to your site?