What is the value of my twitter followers

I have a number of different Twitter accounts all run in slightly different ways with a total of about 8,000 followers across all the accounts. Once a quarter I sit and review my return on investment (ROI) I use a number of different applications such as, Hootsuite, Tweetdeck and Twitters own analytics Which I have talked about before Twitter Analytics

Which enables me to delve into the demographics of my followers and see what they are interested in and how best for me to interact with them.

TWITTER AUDIENCE STATS

62.0% are male
94.8% are married
45.0% are parents
41.2 yrs average age
$51.0k/yr. avg. income

AUDIENCE LOCATION

An international audience, with top cities:
London (23.3%)
Manchester, UK (17.7%)
New York (3.2%)
Bolton (3.2%)
Preston (2.1%)
Los Angeles (0.9%)

@CarlBradshaw’s followers are in their early forties, typically married with children and with high income.The account has a notable audience concentration in London.
Professionally, @CarlBradshaw‘s followers are employed as consultants, finance/banking professionals, sales/marketing managers, senior managers and web developers. The account ranks within the top 10% of all Twitter accounts in terms of density of entrepreneurs.

In their spare time they enjoy political news, travel, cooking, golf and reading. People following @CarlBradshaw are charitably generous.
As consumers they are relatively affluent, with spending focused most strongly on health/fitness, travel and technology. Their strongest brand affiliations include Fitness Republic, Days Inn, Holiday Inn, Zipcar and Starwood Hotels.

On Twitter they are very influential, tweeting most often about business, news/politics and apps. Notable audience correlations include @JuliaGillard, @lonelyplanet, @Lord_Sugar, @Number10gov and @MrKRudd.

TOPICS OF DISCUSSION

#bizitalk #startups #employment #exciting #networking #googleplus #internet #MCFC #indie #shopping #sales

By regularly looking at this information, and using the topics of discussion and the areas my followers tend to spend in, I can engage with my Twitter followers and in time, make them clients, and start to gain value from the use of social media.