According to Verizon's official Twitter account,

users will in fact get to enjoy another month of free mobile hotspot, presumably thanks to the

delay and
subsequent promo of its own:

@VZWSupport: @mgluna The free Hotspot offer has been extended through June 15th and includes Thunderbolt users. *CM
Now that Thunderbolt and Charge users are on the same page, it looks like Verizon's ready to price the LTE hotspot feature post-promotion with the same structure currently in place for its 3G hotspot:

@VZWSupport: @jthomas99 The cost of the Hotspot Feature is $20.00 for a 2GB allowance once the promotion ends. *CM
Remember, blowing through 2GBs on LTE will be a much quicker task than on the 3G network, but we won't get too antsy until we see it in written in stone. With that said, is $20 worth it? Who'll be signing up on June 15?

Sources: @VZWSupport (extension); @VZWSupport (pricing)

Thanks everyone who sent this in!