If the goal is to increase the member base quickly, it might be better to lower the TL2 requirements than to simply grant TL2 to everyone
tl2 requires topics entered - 20
How many topics a user must enter before promotion to trust level 2.
tl2 requires read posts - 100
How many posts a user must read before promotion to trust level 2.
tl2 requires time spent mins - 60
How many minutes a user must read posts before promotion to trust level 2.
tl2 requires days visited - 15
How many days a user must visit the site before promotion to trust level 2.
tl2 requires likes received - 1
How many likes a user must receive before promotion to trust level 2.
tl2 requires likes given - 1
How many likes a user must cast before promotion to trust level 2.
tl2 requires topic reply count - 3
How many topics user must reply to before promotion to trust level 2.
TBH I don’t see where any of those are that out of reach or unreasonably high