It's a fair concern - a lot of sites publish reviews that are little more than promotional copy. There are various types, and among them, the most common are match bonuses and fixed bonuses. There are easy-to-follow charts that can tell you when to hit, stand, double-down, or split pairs.
viewtopic.php?f=20&t=241523 http://178.210.82.182/forum/administrat ... kok-online http://forum.spolokmedikovke.sk/viewtop ... &t=1156807 https://www.ww2.site/forum/viewtopic.php?t=30838 http://treasureillustrated.com/showthre ... tid=366879 viewtopic.php?f=22&t=200391 http://forum.spolokmedikovke.sk/viewtop ... &t=1229431 http://aficionado.pl/showthread.php?569 ... a&p=616882 https://www.ww2.site/forum/viewtopic.php?t=52222 http://forum3.bandingklub.cz/viewtopic. ... &t=1699578
