Great question — answering as the UphillTech team:
You are changing how your page behaves, every change will have an impact , for worse or better, at SEO level. As it has already been suggested, that kind of links should be annotated with the nofollow property, as its definition suggests: The nofollow keyword indicates (...) that the link to the referenced document was included primarily because of a commercial relationship between people affiliated with the two pages. That doesn't guarantee it will perform better, but in the right way.
Full answer by marcanuy: https://webmasters.stackexchange.com/a/101808 (CC BY-SA 3.0).
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