Could someone help by evaluating my AWA?

I have my GMAT is 2 weeks! I just started my preparation for the AWA section and this is my first attempt at writing a full length AWA.
Any help in improving it would be really helpful as I am not aware of my weak points specific to this section. TIA


The following was used as part of an internet advertising company's appeal to businesses: "Furniture Depot employed our internet advertising company to help. Since then its sales increased by 10% over last year's totals. Furniture Depot's success demonstrates how using our internet services can increase your profitability."

Describe how well reasoned you find this argument. In the discussion be sure to analyze the line of reasoning and the use of evidence in the argument. For example, you may need to consider what questionable assumptions underlie the thinking and what alternative explanations or counterexamples might weaken the argument's conclusion. You may also address possible changes in the argument that would make it more logically sound, and what, if anything, would help you better evaluate its conclusion

-- MY RESPONSE

The argument includes the claim that Furniture Depot employing the internet advertising company directly resulted in increase of company's overall sales. It concludes by saying that employing the internet advertising services would increase the profitability of any business. But the conclusion of the argument relies on several assumptions for which there is no clear evidence. Hence, the argument is unconvincing and has several flaws.

Firstly, the argument readily assumes that the increase in Furniture Depot's overall sales is only due to the marketing efforts made by the internet advertising company. There could be several other factors impacting the overall performance of Furniture Depot. Failing to mention this only weakens the argument.

Secondly, the argument also fails to take into consideration if the same marketing efforts, which were made for Furniture Depot, would even work for other businesses. The marketing campaigns cannot be the same for every business and need to be tailor made, based on the market to which these businesses cater. Thus, the assumption further weakens the overall conclusion of the argument.

Thirdly, the argument misses out on mentioning the performance of the overall furniture industry. This information would be critical to the argument for deciding if the increased sales were motivated by the growth of the industry or the marketing efforts made by the internet advertising company.

The argument could have been much clearer if it provided more support to it by mentioning if Furniture Depot had made any other changes to its operations. This could help us properly evaluate, if the increased sales were a direct result of internet advertising or not. Another important factor which the argument should have included is the performance of the competitors as well as the overall industry, which would help it highlight the level of impact of the internet advertising company's efforts in Furniture Depot's increased sales. Without these elements, the argument remains unsubstantiated and open for debate.