There’s a couple of great reasons not to cancel that Capital One Venture card so quickly–or do the other sign-ups and switches you mentioned. That kind of activity is considered “churning” and credit card companies frown upon it. Anytime you sign up for a new credit card, there will be a hard inquiry on your credit report. Too many hard pulls on your credit can adversely affect your score. Opening and closing multiple cards within a short period of time can be a red flag on your credit report too. This means you might not even get approved for a new card if your credit card sign-up and closure patterns seem to be that of a churner.
Also, when you mention switching to different cards, keep in mind that sign-up bonuses almost always require a minimum spend, usually a few thousand dollars within a relatively short period of time. So even if you get approved for three different cards in less than a year’s time, the total amount you’d have to spend to earn the bonuses on three different cards could be pretty significant. Unless you are confident you can pay those initial spends to reach the bonuses in full without any finance charges, it may not be such a great deal to get those sign-up bonuses in the end.
I hope this makes sense. If you don’t want to pay an annual fee, maybe consider calling Capital One and asking for a product change to the Capital One VentureOne. That’s the no-annual-fee version of the Capital One Venture card and it has most of the same benefits, just a slightly lower rewards-earning rate.
Let me know if you have further questions!