Depending on a brand, becoming an affiliate may have its prerequisites. Some affiliate marketing programs like that of Plain Los Angeles are quick, easy, and commission-based while some require a few things like follower / view / engagement count and offline popularity. Some have niche targeting, too, so it depends on the brand industry as well in terms of getting affiliated. For the previous example, one can sign up already while still fresh and building up audience or popularity. But effort and charisma are needed in order to reap the benefits which is commission. For the latter example, one must already have established a community of supporters. But aside from commission, other perks like freebies or fees are given as well. Other agreements like exclusivity and duration / frequency of promotion are dependent on what will be discussed by both sponsor and influencer / affiliate.
There are also affiliations in terms of blogging groups or associations. This is like a membership among website owners in order to assist and support each other in terms of blogging lifestyle and efforts. This way, everyone also may get a chance to benefit from getting noticed and sponsored as well.
It is not bad to get sponsored or to promote sponsored content. What’s bad would be exaggerating or not being transparent on certain things or reviews which may lead to possible backlash from online audiences. With a level-minded approach to content, one can establish credibility and sincerity. After all, authenticity is attractive.