Having a good call to action is important for any sales-driven website, but timing is everything. Websites that engage a popup prompting the reader to subscribe to a newsletter after an article loads are annoying.
Ask yourself: would this sales tactic work anywhere else?
Imagine a face-to-face sales meeting where after saying hello and shaking your prospect’s hand you immediately slide the signature page across the table, asking for the sale. You haven’t even explained what you’re selling yet or how it helps them, so how can you expect them to put ink to paper?
Worse yet, since the popup is annoying they’ll probably click the ‘X’ and close it.
Once it’s closed, you’ve missed your opportunity to ask them for the sale (or in this case, subscription).