How do you keep up with their policies, and updating every user if you decide to ditch Zapier and use Integromat? What happens if airtable or whatever you're us

How do you keep up with their policies, and updating every user if you decide to ditch Zapier and use Integromat? What happens if airtable or whatever you're using sells to Facebook? It's more keeping track of the replaceable moving parts and keeping your users in the loop plus what complying with consents they've given than data storage I'd imagine having issues with. I could very well be wrong, it just sounds like more work than getting someone to code you up something. I could also care too much, worst case you'd get a slap on the wrist for a first offence (although I personally follow GDPR for moral reasons as well as legal, I am aware others don't care haha)