This Is one of those things that nobody would offer as a starter plan. It is also why I can guarantee your pressence, reach & growth. Some of these platforms might not be popular or recognized. However, they have major benefits of being created and maintained.
Intricate Cross platform Link Building
Every URL , Link , hashtag, etc & the CONNECTIVITY between them, gives you weight , creates Rank and search ability. Google calls it relevant & Rich call to actions that create traffic. Even your advertisements become less expensive and more likely to convert.