Exclude active subscribers from flows

Did you integrate Recharge with Klaviyo? You should have custom properties like rc_active_subscriptions_variant_ids on the users profiles you could use for that. 

Yes, I've integrated. 
Okay. So, what's the profile filter to exclude the current active subscribers? Can you please mention the full profile filter? 

If Recharge is integrated with Klaviyo there will be a metric “Order placed successfully on Recharge” available for filters, segments, and conditional logic.
Use the flow filter “What someone has done...” > Order placed successfully on Recharge > 0 times in the last XX days. 
I add a couple of days to the longest recurring subscription period. 
So, for example, if the longest recurring sub period is 30 days, I use ...in the last 32 days.

That filter will exclude profiles with active Recharge subscriptions from the flow.
 

Just have a look at a profile you do not want to send an email to to see what’s available. If you want to exclude users with any active subscription you can probably always use Properties about someone > rc_active_subscribers doesn’t contain true. If you want specific products excluded you use Properties about someone > rc_active_subscriptions_variant_ids doesn’t contain your variant ids. Really depends on what you wanna do and what data is available on the users profile. 

Yes, I checked on few profiles with this property: rc_active_subscriber
What I found is, they have started subscription and have already cancelled. I looked into their journey. But the property ‘rc_active_subscriber’ is still showing 'True’. So I don't believe in that property anymore.

You can clearly see that in the image below. The person has cancelled his subscription. The subscription was never started again after the cancellation. But it is still showing ‘True’.

In this case I would definitely pick it up with the Recharge Support and ask them why in that case it still shows as true. 

In the meantime maybe you can find a reliable event to use like Claudia suggested.