Mostly true.
Try to use Steempeak instead fo the steemit website. It is easier to manage your communities.

Yes most Tribe tokens on Steem-engine are worthless. Remember Steem-engine is just a side-chain project and they can run away with the funds at any time.

However there are a few tokens that are trying to have a purpose. Some are investment tokens that earn you rewards and upvotes. Some like BATTLE are now being used in the RADAQUEST mini-game and you can win prizes.

DEC - still let's you buy Splinterlands cards.
SIM - let's you buy Steemcity cards and play

So yes 99% percent are worthless but a small few have a purpose and the community around them is growing that purpose. Also sending BEER to people in the comments is fun.

Basically the Steem-Engine used the delay of communities to line their pockets. But don't call of them SCAMs ! some of the people behind the communities are trying like SteemLEO but then you have STEEMACE that did Holybread and abandoned the community.

So like i said your mostly correct.