Intangible Virtue gives +1/+1 and vigilance to token creatures you control. This applies to all tokens regardless of what effect created them. Most token creatures are basic, in that they are vanilla creatures with a name, color, type, power and toughness, or they have a singular keyword ability like flying or deathtouch. See the tokens created by Moan of the Unhallowed, Stitcher’s Apprentice and Doomed Traveler for examples. The effect from Intangible Virtue will obviously apply to these creatures.
However some token creatures are copies of other objects and not as simple as the examples above as these copies are exact copies will all of the characteristics of the original. For example, Back from the Brink generates token copies of cards that were exiled from your graveyard. These copies will have all of the abilities of the original cards. Even though these copies are more complex than other tokens the effect from Intangible Virtue will still apply to them.