Grafana License

From what I read, starting with version 7.5, Grafana changed its license from Apache to AGPL. Question: So, is it possible to use version 7.5, modify it, and deploy it in an enterprise environment? Why have some forks been created, like plutono ( GitHub - credativ/plutono: Fork of Grafana keeping the Apache License )? Why is it no longer possible to use the name “grafana”?