Cheap version offers minimal support. (Although you still have to sift "bug reports" into my problem/ your problem.)
Standard version allows for more support (but still rate limited.)
Developer version charges for time spent, in advance.
This helps because people only expect free support if you don't explicitly offer something else. If you offer paid support them it's reasonable and expected that there are limits on free support.
Cheap version offers minimal support. (Although you still have to sift "bug reports" into my problem/ your problem.)
Standard version allows for more support (but still rate limited.)
Developer version charges for time spent, in advance.
This helps because people only expect free support if you don't explicitly offer something else. If you offer paid support them it's reasonable and expected that there are limits on free support.