Not sure what all the fuss is about, really. It was clear to me from the Flex information on the website and the T&Cs that the initial payment was taken immediately.
It was also clear that the interest free option was 3 payments, not specifically 3 months.
Monzo writes…
We’re getting in touch to let you know that we’ve removed the £30 minimum amount and you can now flex eligible purchases under that amount.
Lots of you told us that removing this would give you a better experience. So we’ve given you even more flexibility when paying for purchases over time.
Oh boy, I’m going to be flexing more I think…
Yep just had this email
That’s a shame. I enjoyed having a £30 minimum limit to control unnecessary flexing
Does this fix the active card checks too?
Yes 
This is good for people that want to use it for lower amounts but seems bizarre to me to spread such a low figure over 3 months (or more)
I want to flex an aero over 3 months
ON IT
So how does this work on installments now for lower amounts?
Bye bye Tymit, I have no reason to use you anymore!
Except the credit card protection obvs 
Please don’t do this, Monzo.
This is what happens when you Flex something under £3.
Which was a very enjoyable experience.
I would assume then something on a Flex card would have the same behaviour, (Pick an instalment plan!) but will test it out on tomorrows Greggs visit.
I’ve just spent £22 at just eat it normally all goes on PayPal credit tbf. Thought flex can have a turn now it’s allowed.
Edit to add the payment installment screen
You get the same protections as a credit card with the Virtual Flex Card 
If I put £300 on a credit card and tell myself I’m paying off £100 a month for the next 3 months, there’s a very good chance I don’t do it. Flex keeps me in check.
