[kislotnik]

Can we thank getty by popularizing free photography sites like unsplash? Any other alternatives?

[thrilleratplay]

Quite a few as it turns out

https://github.com/neutraltone/awesome-stock-resources

[myfonj]

OT-ish: for such questions there is an excellent web-app:

https://alternativeto.net/browse/search?q=unsplash

… reveals several services, but personally cannot judge. (TBH, haven't known even Unsplash -- thanks for that.)