Can you activate an activated ability more than once per turn?
Yes, there is no restriction in the rules that prevents a player from paying the costs of an activated ability twice, to get the effect twice.
An Activated Ability is the only ability that can be activated. You may activate it whenever, and as many times as you like, as long as you have priority by paying the cost.

602.1. Activated abilities have a cost and an effect. They are written as &quot;[Cost]: [Effect.] [Activation instructions (if any).]&quot;
602.1a The activation cost is everything before the colon (:). An ability's activation cost must be paid by the player who is activating it.

Unless the ability itself restricts its usage.

602.5b If an activated ability has a restriction on its use (for example, &quot;Activate this ability only once each turn&quot;), the restriction continues to apply to that object even if its controller changes.