What cost efficient survey tool would you use if you were in my shoes?

I have been a streamer and content creator for 9 years so I have built up quite a following across my social networks already (~500K). I would like to learn more about my audience to elevate my content and form more mutually successful partnerships. I love working with ai services, iot, saas and tech brands but most survey tools I have found so far would unfortunately cost a fortune &/or only give a small percentage of my audience a voice.