One factor is that TAN snagged 4 exclusive simulcasts from Sentai, whereas last two seasons they added none (unless you want to count Love, Elections & Chocolate, which was licensed so close to the end of the season that the final episode won't be posted until a week from now).

We also have yet to see what Funimation has netted (and probably won't until a week from now), and they had stated earlier in the year they would be putting more effort forward in the fall for simulcasts.

TheAncientOnewrote:
One factor is that TAN snagged 4 exclusive simulcasts from Sentai, whereas last two seasons they added none (unless you want to count Love, Elections & Chocolate, which was licensed so close to the end of the season that the final episode won't be posted until a week from now).

It's not really that they "snagged" them so much as that all 4 are TBS shows, which, to my knowledge, TBS has never streamed on CR.
So Sentai really had no other choice, if they wanted to simulcast them, TAN had to do it.

TheAncientOnewrote:
One factor is that TAN snagged 4 exclusive simulcasts from Sentai, whereas last two seasons they added none (unless you want to count Love, Elections & Chocolate, which was licensed so close to the end of the season that the final episode won't be posted until a week from now).

It's not really that they "snagged" them so much as that all 4 are TBS shows, which, to my knowledge, TBS has never streamed on CR.
So Sentai really had no other choice, if they wanted to simulcast them, TAN had to do it.

I can think of only two examples of TBS series on Crunchyroll:

The Idolm@ster and NakaImo . However, I think your point still stands though. TBS likely trusted TAN more since TAN has been around much longer than Crunchyroll.

TheCoffeeGodwrote:
It's not really that they "snagged" them so much as that all 4 are TBS shows, which, to my knowledge, TBS has never streamed on CR.
So Sentai really had no other choice, if they wanted to simulcast them, TAN had to do it.

You seem to be implying TBS has something against CR.

Chuunibyou demo Koi ga Shitai! and To Love Ru Darkness premiered on Tokyo MX, and don't even air on TBS at a later date.

While The Idolm@ster was on TBS, it appears licensing for it was actually handled by Aniplex. Even then, it could hardly be called a simulcast. Nakaimo - My Sister is Among Them! was on TBS, and was definitely a simulcast, but shows as licensed by Media Factory.

Even TAN hasn't had much success simulcasting TBS shows (no more than Funimation), so getting two in a single season is quite a coup.