https://play.google.com/store/apps/details?id=com.iudesk.android.photo.editor Here's the link of the app ( I'm using android but I think you can find the same on AppStore). Here you can use different shapes, fonts and images. I made a background of a card from the simple image of Black Mamba from Google. Kobe's pic was also found there (Didn't merge it for myself, just googled 'Kobe Bryant PNG'. Than you can just use some shapes, effects, cutouts, shadows, blur, blemish, frames and all those things... Usually each card requires 10 - 20 minutes. Everything would be easier if there was a online card maker like it is for FIFA players or like it was during Season 1, but now it's only about easiest amateur skills of Photoshop (I can't even call this Photoshop, cause this app doesn't even require tools, than has Adobe Photoshop, for example) and patience :D Can't tell you all details, because these are too much. But actually, that's all ;)
Looks like they have a VIP program that allows you to get free Pro Packs with membership. Not sure about other perks. A lot of players are actually the same, but they have this Spring Festival promo which gave the Master Lin with buzzer beater instead. Not sure if there are others, maybe their trade deadline promo which is still going on has a few. Also, they are very behind on TOTW which also has a different name.
Here, you should be able to download the apk: https://www.apkmirror.com/apk/electronic-arts/nba-live-mobile/nba-live-mobile-3-5-00-release/
Otherwise, it’s probably time to think about getting an upgrade. If the apk doesn’t work, there’s always bluestacks for your computer.
https://play.google.com/store/apps/details?id=com.catdaddy.nba2km
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It appears you can only pre-register on Playstore for now, I'm using an iPhone.