There hasn’t been much incentive to become licensed.
Take Five, that may be the case for a very small number. It's quite a stupid statement actually.
The opportunity to get a type course has virtually disappeared in many areas. It's not so much a case of no incentive, rather no opportunity.
The incentive to become licenced is career progression. A level 13 AME with a PE will drop $ when obtaining their first licence however, they have simply climbed off the top rung of the AME ladder and onto the bottom rung of the LAME ladder.