Cruz now angling for the dope smoking open borders pro abortion vote
If you read the article, the libertarians recognize that Cruz is not a libertarian, just the most libertarian of the bunch. Moreover, they are down with his plan to revive the long dormant Reagan Coalition (of which they are an important part) and are moving to Ted Cruz in large numbers because of it.
Keep in mind that it was the long-haired, dope-smoking, free-love hippies that evolved into the Yuppies that voted Reagan into the Presidency. Twice. By landslides.
In politics you find allies and common ground wherever you can, trusting that your new allies will “grow” in your direction politically and ideologically. Or at least grow away from the other side.
It’s not just Cruz who gets this; Trump does too. BOTH are working towards a deep and robust winning coalition.