Not all collections part of activity-controller?

[CreaaZ]

Hi community,
I used the activity-controller /v0.1/activities/all a few weeks ago to extract all SELL orders from the protocol for a data science task. However, I noticed that some important collections are more or less completely missing in my dataset.
Just to name a few:

• There are only 9k orders for the CryptoKitties collection in my dataset (ETHEREUM:0x06012c8cf97bead5deae237070f9587f8e7a266d); OpenSea reports more than 785k orders
• There are only 800 order for Sorare in my dataset (ETHEREUM:0x629a673a8242c2ac4b7b8c5d8735fbeac21a6205); OpenSea reports more than 400k orders.
• There are only 2.6k order for Axie Infinity in my dataset (ETHEREUM:0xf5b0a3efb8e8e4c201e2a935f110eaaf3ffecb8d); OpenSea reports more than 175k orders.
• ... there are plenty of other collections with huge discrepancies.

Can somebody please help to understand what the reasons for that are?
Thanks! CreaaZ