Well, I ain't gotta dollar 
But I don't need a dime 
I got a little spot in the country 
Where I spend all of my time 
When the sun goes down on this itty-bitty town 
We can light up the bowl and pass it around 
And I ain't gotta dollar 
But I don't need a dime 
 
Well, the rain could be pourin' 
Or the sun shinin' down 
Long as my old truck still fires on up 
And there's crops growin' in the ground 
We'll have to pick some muscadine right off the vine 
Get a little yeast and make a little wine 
'Cause I ain't gotta dollar 
But I don't need a dime

Our team has done a lot of work on lowering the cost of proving transactions inside a zkRollup. The new zkEVM prover can prove transactions at a rough cost of $0.000052/tx. 
 
For scaling context: you could prove every post, comment, follow, mirror and collect on @LensProtocol for under $1300, less than 1 ETH... and we are just getting started. 
 
Tag other popular apps and I'll reply with how much it would cost to prove all their transactions, and get ready to see these optimizations over on Polygon zkEVM soon :)