High resources usage and support without solution

I tested the plugin in 30 websites and the plugin uses a lot of RAM. In shared hosting for expamples blocks the accounts. In VPS uses all RAM available (more than 3GB). The plugin creates additional tables in the database with more than 30.000 or 50.000 rows and more than 50mb… After talk with support team (with many email), they don’t offert any solution. So I lost 200€ of my money… I don’t recommed it.