I do not understand why they need to provide 2 months worth of...

I do not understand why they need to provide 2 months worth of chemicals at no charge to demonstrate if our product is successful or not. I’m sure 2 weeks would be sufficient a trial. I have emailed the company my opinion on this asking for clarification and surprise surprise no response.
Also no talk of monetary value as they will certainly say the trial was a failure. When something smells fishy, there is usually fish around!!!
can others try asking the company the same questions in the hope of a response?

Things look a little shady