A browser extension is a plug-in that extends the functionality of a web browser. Some extensions are authored using web technologies such as HTML, JavaScript, and CSS. Most modern web browsers have a whole slew of third-party extensions available for download. In recent years, there has been a constant rise in the number of malicious browser extensions flooding the web. Malicious browser extensions will often appear to be legitimate as they seem to originate from vendor websites and come with glowing customer reviews.[32] In the case of affiliate marketing, these malicious extensions are often used to redirect a user's browser to send fake clicks to websites that are supposedly part of legitimate affiliate marketing programs. Typically, users are completely unaware this is happening other than their browser performance slowing down. Websites end up paying for fake traffic number, and users are unwitting participants in these ad schemes.
Since the emergence of affiliate marketing, there has been little control over affiliate activity. Unscrupulous affiliates have used spam, false advertising, forced clicks (to get tracking cookies set on users' computers), adware, and other methods to drive traffic to their sponsors. Although many affiliate programs have terms of service that contain rules against spam, this marketing method has historically proven to attract abuse from spammers.
Market leader: The market leader dominates the market by objective measure of market share. Their overall posture is defensive because they have more to lose. Their objectives are to reinforce their prominent position through the use of PR to develop corporate image and to block competitors brand for brand, matching distribution through tactics such as the use of “fighting” brands, pre-emptive strikes, use of regulation to block competitors and even to spread rumours about competitors. Market leaders may adopt unconventional or unexpected approaches to building growth and their tactical responses are likely to include: product proliferation; diversification; multi-branding; erecting barriers to entry; vertical and horizontal integration and corporate acquisitions.
Developing competitive strategy requires significant judgement and is based on a deep understanding of the firm's current situation, its past history and its operating environment. No heuristics have yet been developed to assist strategists choose the optimal strategic direction. Nevertheless, some researchers and scholars have sought to classify broad groups of strategy approaches that might serve as broad frameworks for thinking about suitable choices.
In 1980, Michael Porter developed an approach to strategy formulation that proved to be extremely popular with both scholars and practitioners. The approach became known as the positioning school because of its emphasis on locating a defensible competitive position within an industry or sector. In this approach, strategy formulation consists of three key strands of thinking: analysis of the five forces to determine the sources of competitive advantage; the selection of one of three possible positions which leverage the advantage and the value chain to implement the strategy.[68] In this approach, the strategic choices involve decisions about whether to compete for a share of the total market or for a specific target group (competitive scope) and whether to compete on costs or product differences (competitive advantage). This type of thinking leads to three generic strategies:[69]

In corporate law and taxes, an affiliate is a company that is related to another company, usually by being in the position of a member or a subordinate role, a subsidiary. According to​ Investopedia, a subsidiary is a company "whose parent is a majority shareholder." (That means the parent owns 51 percent or more of the other company's shares of stock.