It’s not just a problem in the future, it is now.
CockroachDB changed its license terms after Amazon forked it and began offering a hosted service at a price.
Same reason why ElasticSearch changed its license. It’s an almost similar issue with Terraform.
OpenSource was great until it stopped being great. Now the question for most maintainers and creators is: why should others profit off the back of my labour while I get nothing?