Oh, this is disappointing. I'm sorry but I beg to disagree with this one. This shouldn't be necessary. In real life, this is a catastrophe. It's buying friendship. Please avoid using this method. If you have money, go and use the Paid Advertising being offered by Facebook to boost your posts. (facepalm)
Anyway, to answer your question...
Daily increase in your FB Page likes and Twitter followers is not guaranteed. And your page may be stagnant because you are not updating it daily. However, if your case is that you are updating it daily, posting relevant contents and tweeting a lot, then you have to look at the following:
1. Your Facebook Strategy should be different from your Twitter Strategy.
Others say that Facebook is better than Twitter, while others say it is the opposite. I would like to believe that although both are Social Media Sites, they target different users. A lot of blogs and articles have been published differentiating the two, and they are saying that the most successful Facebook Pages are those which posts IMAGES along with their content while Successful Twitter pages are those which tweets the most relevant and informative.
It's not only about the Likes, it's about the PEOPLE LIKING your page.
This is to pinpoint the "buying of likes on Facebook". Sometimes, people are only looking at the number of likes on a page. However, what YOU SHOULD really prioritize is that the people who will like your page are those that are really willing to interact with what you are posting. Are they really interested in what you are offering? Are they willing to like your posts? Are they interested thus willing to comment on your posts? And are they willing to share what you have posted?
Stop being STAGNANT by POSTING
Of course, this may be obvious. BUT what must be kept in mind is that it is not necessarily needed to post on your page thrice a day. You can even do a Thrice a week depending on the schedule you are willing to allot in your Social Media Strategy. As long as what you will be posting are helpful, it will be noticed by people in their news feed.
I hope this can shed some light in your Social Media Marketing...