Beat: yup Brag: nope

I think the best spots to ''bet tiny'' (better definition of blocker bet imo) is when the opponent has polarised their check back range. Sounds really stupid, but it makes sense vs certain opponents. If a villain only bets turn with a gutshot or better, and they cbet flop and check turn on a total brick, they frequently have air give ups (or they paired the turn undercard, typically).

e.g. K72ss, 5o. cbet, x/x - hands like this might be ~A8cc, QJcc, J9cc, backdoor FDs non improved. 56s maybe, a5s (w/ flush redraw). So give ups or low sdv. So blocker betting river small can be good with our busted draws, air, top pairs, 2nd pairs. Since he has a lot of give ups which are inelastic vs our bet size, we can go tiny with our range.

This is the most appropriate scenario imo to use blocker/tiny bets. I personally don't do this much, I find that people will just call ace high and 3rd pair vs 33% pot, which tilts me. So I think I just go larger size with my range. It depends, maybe I'm selectively remembering the times I got called and lost and forgot all the times I bet tiny and got it through.

For completion: The spots where I don't think it's good is to bet, bet (normal sizes, 50%+) then on a scary card for us, bet smaller then fold loads to raises. I think that line sucks.