It's a non scalable outreach tactic. It's not a strategy.
Yes it has a good chance to work, if you are willing to spend hours researching your target, hours producing free content for that target, and insisting until the target gives up and give you what you want.
Yes it has a good chance to work, if you are willing to spend hours researching your target, hours producing free content for that target, and insisting until the target gives up and give you what you want.