seriously asking and need an immediate answer. Excuse me.

I will be holding a webinar tonight with more than 1500 participants.

and I will give them a bonus.

to get the bonus, during the webinar, at that moment I asked them to DM me with certain keywords,
then I replied and sent the bonus access using Manychat.

Question: If thousands of people DM at the same time, is it safe for my Instagram account?

please help with the answer. Thank you to all of you