We have free and paid subscriptions. You can obtain additional information about the rates and functionality here: https://taplink.at/en/tariffs/
Yes. If you pay for 6 or 12 months right away, you will get 30% of 50% off respectively.
We have very reasonable prices. Most services charge more per month that we do for three.
No, we never use any prohibited techniques. We only use Instagram for authentication. Our service was approved by them when we were connecting the API. To do that, it was required to provide a screencast of the way the service works.