Comment by ghaff

The whole Apache license isn't very long but this is mostly the extent of your obligations: "You must retain, in the Source form of any Derivative Works that You distribute, all copyright, patent, trademark, and attribution notices from the Source form of the Work, excluding those notices that do not pertain to any part of the Derivative Work."

Apache is a non-copyleft license. Copyleft licenses like the GPL also require that any code changes, derivative works code, etc. needs to be made available if the software is distributed.

However, you can absolutely charge for support, etc. (But I can't assert copyright over code I didn't actually write.)

>Is there any kind of license that protects the interest of opensource developers

If by "protects the interest" you mean forces consumers of the code to pay them or allows them to restrict who uses their code, then pretty much no. The Open Source Definition as it stands pretty much excludes those kind of restrictions. The developers could of course just choose a proprietary license instead if they want to control how their code is used.