Exhibits cards - mainstream, oddball, what?

[MCoxon]

Guys - quick question. Have collected off and on for 30+ years but had never really seen, much less collected, Exhibits cards until stumbling upon them on eBay over the past few months.

I have gotten a few now, and really like the old-time look and feel of them (e.g., the Hank Aaron and Jackie Robinson 1947-66s just look cool).

I've also picked up a few 1939-46 Salutations Exhibits, e.g,. Ted Williams, Bob Feller.

Questions:
1) Do you guys consider these mainstream?
2) Do you even consider them baseball cards? Or more postcards?
3) Are the Statistics Back Exhibits more desirable, in your opinion? (I think the Maris is sweet, tried to bid on one but it went way over my max bid)

My grandfather was a sportswriter and my dad gave me a few old time press release/photos as well (e.g., Rocky Colavito), but I think these are different from the Exhibits "cards"? Do any of you collect the old press release photos?

Any way, I love the vintage look and feel of the Exhibits, and just wondering what other collectors think and any insight on how these cards were distributed, quantities, etc.

Thanks a ton,
Mike