Every game at every site listed here returns less than it takes over time. A new casino is no different from an old one in that respect, and a large welcome offer does not change the arithmetic -- it usually just delays when you notice it.
A site with no track record is a site where you have no evidence about how disputes are handled. That is a reason to deposit less, not more. The opening offers in this category are unusually large precisely because the operator has nothing else to compete on, and a big number is an invitation to deposit more than you planned.
Gambling with money meant for something else. Chasing losses with bigger stakes. Playing longer than intended, repeatedly. Hiding what you are spending. Borrowing to play. Opening account after account at new sites to collect welcome offers. Feeling restless or irritable when not playing.
ConnexOntario runs a free, confidential helpline 24 hours a day on 1-866-531-2600 for anyone in Ontario. The Responsible Gambling Council at responsiblegambling.org publishes support resources for the whole country. Every province funds its own problem-gambling service -- the Alberta Health Services helpline, BC's Gambling Support Line, Manitoba's Addictions Foundation and Quebec's Jeu: aide et reference among them. Gamblers Anonymous runs in-person and online meetings across Canada.
Deposit limits set before a session are far more effective than a decision made during one. Ontario-registered operators are required to offer limit-setting and time-out tools. Offshore sites vary and newly launched ones are often the weakest on this, which is worth knowing before you choose one. Ontario's self-exclusion programme covers registered operators; it does not reach offshore sites, so device-level blocking software such as Gamban or BetBlocker is the more reliable route if you need to stop.
Call 1-866-531-2600 or visit responsiblegambling.org. Changing casinos is not a solution to a gambling problem, and a new one is not a fresh start.