Retweets do lead to exposure, which can lead to offers of work. Many people I know have been approached for (paid) writing jobs purely on the basis of their personal Twitter accounts. Many of them aren’t writers or comedians by trade, but this gives them an opportunity to do something they enjoy and make either essential or additional income. In some cases it has even led to entire career changes. It has genuinely changed lives and bank balances.
Please take time to read the whole thing, as we are going to dive in-depth into attribution, theft, intellectual property, etc… in the coming days: