In my ads, do I always have to ask for the email to make a follow up sequence?

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So my question is I have my ads, but in those ads, do I always have to ask for the email to make a follow up sequence or something like that?  Yeah...

In my ads, do I always have to ask for the email to make a follow up sequence?

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In my ads, do I always have to ask for the email to make a follow up sequence?
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