Yes, that would be the classic
"ghetto lion charger" that tends to make people go
in disbelief the first time they see it (that was my initial reaction too) but then you realise how many products with this circuit are in daily use, are not causing any noticeable increase in fires/explosions/etc., and wonder if they know something about lion charging that we don't... it's certainly not a tightly-regulated charge, but I guess it works well enough for a single low-capacity cell. However it's usually used with a protection circuit on the cell, like the ones you linked to.
If you just want to store the cells then keeping them in the 3.7-3.8v range is ideal. Self-discharge shouldn't be that high so just measure them periodically to get an idea of their self-discharge rate, and if they drop to less than 3.6v then give them a brief charge to 3.8v with any suitably well-regulated power supply. Judging by the size I wouldn't charge at more than 100mA.