Abilities that trigger when counters are put on a permanent trigger when a permanent enters the battlefield with counters and when a player puts counters on a permanent.

You can pay only once each time Animation Module's first ability resolves. You can't pay more to create extra Servo tokens.

If +1/+1 counters are put on more than one permanent you control at the same time, Animation Module's first ability triggers once for each of those permanents.