No, most likely not (nobody ever knows, so, legally, we can't say 100% no).
Unlike other services, we use the official Instagram app, an official Instagram supported phone and simply automate the task of uploading the photo on the phone and typing the text. Our robots log you in, do the work and log you out again. It's all done on an actual phone, no simulators, no magic. To keep the data secure, this happens through automated processes controlling these phones, not humans.