In this particular case, it's the fault of the "abused" for even seeing themselves as such in the first place. Many times it's not even a "bait-and-switch", but reality hitting. But even if it was, just deal with it and move on.

Make hay while the sun shines. Be glad that the project happened.

This is definitely the case because the accusations and supposed social contract seem extremely one-sided towards free riding.

Nobody here is saying they should donate the last version of MinIO to the Apache software foundation under the Apache license. Nobody is arguing for a formalized "end of life" exit strategy for company oriented open source software or implying that such a strategy was promised and then betrayed.

The demand is always "keep doing work for me for free".