Hello Murugappan,
I completely understand your concern, but please rest assured this is not a con job!
EasyStore Free is a completely free, standalone version meant to help you run your store without hidden fees.
The reason you are seeing a payment prompt for version 2.0.1 is that it belongs to the EasyStore Pro track, which includes advanced premium features and dedicated updates.
If you wish to continue using the free version, you can always re-download the core extension directly from the EasyStore Free Download Page.
https://www.joomshaper.com/downloads/extension/easystore-free
-Best regards