If you are a site designer, builder, promoter, submission service, even if the words marketing appear on your site or in your business name, this does not make you an Internet Marketer automatically.
This would be for companies who do needs assessment, market research, production design and development, pricing and product cycles and positioning, government and regulatory issues, focus groups, identity development, media planning and development, long range activities ...
In other words, a well established company or consultant with verifiable expertise and contacts. Marketing does not happen, every inch is planned with contingencies for every plan. Many of these sites have case studies of current or past clientele.