I think they have value depending on the context.
For instance, when hiring for a non-technical position (sales or marketing) in a tech organization I always appreciate candidates with some certification. It shows a willingness to learn about the industry, gives credibility to the individual and helps them better understand the technical people they interact with.
I think that on the other hand, having too many certifications as an engineer comes across as bragging, I personally would not advertise that in the email signature, I would probably advertise the most significant (or recent?) ones on LinkedIn.
It is also important to mention that a certification does not necessarily reflect skillset, ability to resolve problems, being a good teammate, or other strengths that are usually more important than the ones required to acquire a certification.
@marykay25, what are the good reasons to get a cloud certification?